Eggplant Casserole

This eggplant casserole is full of the best that summer has to offer – eggplant, fresh herbs, mushrooms, tomatoes, and bell peppers. It’s topped with cheese and baked until bubbling hot. Serve it as a side dish or main dish – it’s perfect either way.

close-up photo of eggplant casserole

If you’ve been following along the last few months you already know I’ve been digging into the archives of this site to find some gems to bring forward and share again and today it’s this eggplant casserole. It’s a veggie-loaded baked dish I first shared back in 2009 and it’s worthy of another moment in the spotlight.

It’s comforting without being heavy, it’s vegetarian but filling, and there’s cheese which is always a sure-fire way to get me to happily eat a bunch of veggies. It’s also a great excuse to raid the local farmer’s market in the summer.

It doubles as both a side dish and a main dish – you can serve it just as it is or add some rice or pasta on the side. Or, serve it as a side dish for chicken, pork or steak. I’ve even served it on toasted hot dog buns – it makes a great sandwich filling.

Like ratatouille, it’s a celebration of summer veggies with eggplant as the star, and now is the perfect time to give it a try. I think you’re going to like it.

Ingredients You’ll Need

Not gonna lie, it feels good to shop for this recipe. Look how healthy we are with a cart full of vegetables! Pro tip: I just tuck my ice cream and pizza rolls underneath them and no one knows except for me and the cashier.

overhead photo of vegetables for the casserole
  • Butter and olive oil
  • Diced onion
  • Chopped garlic
  • Diced yellow bell pepper
  • Portobello mushrooms
  • Chopped tomatoes
  • Fresh parsley, thyme, and basil
  • Vegetable oil
  • Cubed eggplant
  • Salt
  • Flour
  • Grated Parmesan cheese
  • Shredded fresh mozzarella cheese

How to Make Eggplant Casserole

Yes, this recipe has a few steps but it’s all worth it in the end. It starts on the stove and finishes in the oven and will be met with “oohs” and “ahhs” and “mmmms” when you serve it.

You will need your biggest pan for this recipe. If you don’t have one use a large pot (like for boiling pasta).

Heat the butter and olive oil over medium heat and once the butter has melted add the onion and cook them until the start to soften. Add the bell pepper and garlic and cook them with the onions for a few minutes.

Add the mushroom and cook them until they start to release their moisture and then add the tomatoes and herbs. Stir and simmer for a few minutes before transferring all of it to a bowl.

photo collage showing recipe steps for cooking the vegetables

In the same pan, add the eggplant, salt and oil. It will seem like a lot of eggplant, but don’t worry – it will cook down quite a bit. Cook it until it softens and browns in spots.

Sprinkle the flour over the top of the cooked eggplant and stir it all together. The flour will help thicken the juices so your casserole isn’t watery. Add the tomato mixture to the eggplant, bring the pan to a simmer and cook it all of for a few minutes.

You will need to transfer everything in the pan to a casserole dish. I like to create layers with the cheese by scooping half of the veggies, top with cheese and then add the rest of the eggplant and cheese on top. You can do two or three layers this way or just pile all of the cheese on top and skip the layering.

overhead photo of the casserole ready to go in the oven

Bake the eggplant casserole uncovered for 30 minutes at 375°F. Let it stand for a few minutes before serving.

A Few More Recipe Tips

  • A tablespoon of salt in the recipe seems like a lot but keep in mind that you have a whole lot of veggies that need seasoning. Also, the salt helps the eggplant release moisture as you cook it in the pan. You can reduce the amount if you prefer, but I don’t recommend omitting it.
  • For the cheese, you can use sliced mozzarella (as mentioned in the recipe card), shredded mozzarella or cubed mozzarella (which is what I used in the photos). I prefer the fresh mozzarella for this recipe, but you can sub regular low-moisture mozzarella if you like.
  • The leftovers will keep well in the refrigerator. As far as freezing the casserole, I haven’t tried it and I’m not sure how it would hold up. Sometimes veggies get a weird texture after they’ve been frozen. If you try it let me know how it worked for you.

Flavor abounds and all the veggie good-feels manifest with this eggplant casserole. The echos of the “oohs” , “ahhs” and “mmmmms” will stay with you for days. I mean, I’m just saying it’s good – really good. I hope you love it.

Happy casserole-ing,

close-up photo of the casserole with a wooden spoon

More Summer Recipes

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Eggplant Casserole

eggplant casserole in a baking dish

This casserole is full of the best that summer has to offer – eggplant, fresh herbs, mushrooms, tomatoes, and bell peppers. It’s topped with cheese and baked until bubbling hot. 

  • Author: April Anderson
  • Prep Time: 20 minutes
  • Cook Time: 60 minutes
  • Total Time: 1 hour 20 minutes
  • Yield: 6 servings 1x
  • Category: Dinner
  • Method: Bake
  • Cuisine: American

Ingredients

Scale
  • 2 tablespoons butter
  • 2 tablespoons olive oil
  • 1 large onion, diced
  • 2 garlic cloves, minced
  • 1 yellow pepper, diced
  • 2 portabello mushroom caps, sliced into bite-sized pieces
  • 3 large tomatoes, diced
  • 1 tablespoon fresh parsley, finely chopped
  • 1 tablespoon fresh basil, finely chopped
  • 1/2 tablespoon fresh thyme
  • 1/4 cup vegetable oil
  • 2 medium eggplants, cut into bite-sized pieces
  • 1 tablespoon salt
  • 1 tablespoon flour
  • 1/2 cup Parmesan cheese
  • 4 ounces fresh mozzarella, sliced

Instructions

  1. Preheat the oven to 375°F. Coat a 2 1/2-quart casserole dish with cooking spray.
  2. In a large skillet heat the butter and olive oil over medium-low heat. Add in the onions and cook for 3 minutes or so (don’t let them brown). Add in the peppers and garlic and continue to cook for an additional 3 minutes. Add in the mushrooms and cook them until they start to release their moisture (about 3 to 4 minutes). Finally, add in the tomatoes and herbs and allow to simmer for a couple of minutes. Remove the mixture to a large bowl and set aside.
  3. In the same skillet, heat the vegetable oil and then add the eggplant and salt. Allow the eggplant to cook until it’s browned, stirring frequently. Once lightly browned add in the flour and stir. Add the tomato mixture and stir everything together and bring it to a simmer.
  4. Spoon in 1/3 of the vegetable mixture into the prepared baking dish. Top it with some Parmesan cheese and a few slices of mozzarella. Spoon more of the veggies on top of the cheese followed by more cheese. Spoon in the last of the mixture and top it all of with a layer of cheese on top.
  5. Bake the casserole for 30 minutes. Allow the casserole to stand a few minutes before serving.

Nutrition

  • Serving Size: 1/6 of recipe
  • Calories: 294
  • Sugar: 10.9g
  • Sodium: 1459.3mg
  • Fat: 19.9g
  • Saturated Fat: 8.4g
  • Unsaturated Fat: 10.2g
  • Trans Fat: 0g
  • Carbohydrates: 22.2g
  • Fiber: 8.1g
  • Protein: 11g
  • Cholesterol: 34.6mg

Keywords: eggplant casserole, vegetarian eggplant casserole

Do you love this recipe? Don’t forget to leave a comment and your recipe star rating!

Post and photos updated from the archives. First published in August 2009.

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116 Comments

  1. I made this tonight and it was so yummy! I’m usually very sensitive to salt but this was not too salty at all for me. I used u salted butter (maybe mentioning that in the recipe would be helpful). I also added half a tablespoon of salt to the tomato mixture and then just half a tablespoon of salt to the eggplant (that way it’s still a tablespoon all together but it’s not all concentrated in the eggplant). So for those saying it’s too salty, try that trick 🙂 Goes great with crusted bread!

  2. A friend gifted me some great eggplants from her end of summer haul so I made this tonight. It was delicious and I suspect the leftovers will only get better

  3. Very easy – I loved it! I used cauliflower rather than Portobello mushrooms. Also did 2 tablespoons of flower, rather than one.

  4. So good. Served it over bow tie pasta. Made a great “sauce”. I will make this in the winter to feel the summer vibes.

  5. I am an eggplant lover. My little twist….I made your casserole minus the eggplant. I breaded and deep fried the eggplant and spooned the casserole over it for some crunch. It was bomb!! Thanks for all your wonderful recipes. And your book is awesome.

  6. This was delicious! I chose it because I had the ingredients in some form (red bell pepper, brown mushrooms, etc). I didn’t measure the cheese so I’m sure I added extra :-). I also had a little bit of extra pasta that I threw in and can see this being really good with Italian sausage. Really good!

    1. You could try a 5 quart baking dish, but if you don’t have that size is probably better to do two seperate ones.

  7. I made this last night as a main course and it was delicious! I’m going to make it for Christmas and toast up a baguette with garlic butter to serve it as a Bruschetta. Thanks for this wonderful recipe.

  8. I really liked the makeup of this dish, but it was way too much cheese. I opted to skip the Parmesan because the veggies had enough salt and flavor already and only added mozzarella to the top. As another comment suggests, I also split the tablespoon of salt between the veggie medley and the eggplant so it was better distributed. We ended up peeling the cheese layer off the top and ate it more like a stew, which was delicious. We plan on adding chickpeas to the bulk up the leftovers. I will try this again without the cheese and perhaps add some penne pasta in the dish to make it more of a casserole that will hold together. Overall, the flavors are on point and the veggie combo is great.

  9. This took some time to put together, but it turned out delicious! My man and I both went back for more. We are strict carnivores, so I added sweet Italian sausage, but otherwise followed the recipe almost exactly. I only ended up baking it in the oven for about 15 minutes to get the cheese melted. Delicious and healthy meal!

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