Best Rustic Ratatouille Recipe

Name: Best Ratatouille Recipe
Prep time: 30 min
Cook time: 1 h
Total time: 1 h
Yield: 8
Cuisine: French
Ingredients: 2 eggplants (peeled and thinly sliced); 6 roma tomatoes (thinly sliced); 2 yellow squash (thinly sliced); 2 zucchini (thinly sliced); 2 tbsp olive oil; 1 white onion (diced); 4 cloves of garlic (minced); 1 red bell pepper (diced); ½ tsp sea salt; ¼ tsp black pepper; 1 tsp oregano; ¼ tsp red pepper flakes; 2 tsp thyme; 28 oz crushed tomatoes; 2 tbsp fresh basil (minced); 2 tbsp diced basil; 1 tbsp garlic (minced); ¼ tsp sea salt; ¼ tsp black pepper; 6 tbsp olive oil

Instead of complicated steps, you simply slice zucchini and squash, arrange the rounds in a simple circle (almost like a veggie wheel), spoon on a savory sauce, and bake until everything turns tender and delicious. The result is a comforting homemade ratatouille packed with fresh garden flavor—tangy, saucy, and cozy, with that classic roasted-vegetable taste.

Stuffed zucchini paired with a glass of wine on a white plate.

A ratatouille skillet bursting with vegetables and herbs.

At Ajpal, I add lots of tips in all of my recipes – because I am a home cook without any formal training, and I find I am more confident making dishes when I understand why it works, and what each ingredient means to the flavor of a recipe. My goal is for even the most beginner home cook to feel empowered in the kitchen.

How to Make Rustic Ratatouille

This recipe is a beginner-friendly way to use up summer vegetables, impress your family with a beautiful presentation, and turn what you have into a meal that tastes like it came straight from a French-inspired kitchen.

Ratatouille Ingredients

First assemble the following ingredients:

The veggies:

Eggplants – the eggplant skin can be slightly bitter, so I like to peel my eggplant before slicing them. Try to get moderately sized eggplant for a more even pattern.
Roma Tomatoes – tomatoes are in the sauce but are also part of the layered pattern on the top of this casserole style ratatouille. Use fresh tomatoes if possible.
Squash and Zucchini – these two are the meat of the ratatouille. Squash and zucchini have a savory slightly sweet flavor when roasted, you will want to slice them very thin.

For the sauce:

Olive oil – a good quality oil is important since the vegetable that are cooked in it will take on its flavor, I like to use extra virgin olive oil.
White onion – onion will give a subtle sweetness to the sauce, you can use yellow or white onion for this.
Garlic – garlic has a very pungent savory flavor and is a classic pair to the fresh herbs here.
Salt and pepper – salt and pepper will bring out the flavors and add a little heat. Use fresh ground pepper.
Oregano, Thyme, Basil – this classic Mediterranean trio will be the dominate flavor in the ratatouille. I recommend using all fresh herbs for this dish but you can substitute dry as needed.
Crushed Tomatoes – you can use crushed canned tomatoes or simple cut up 28 oz of tomatoes and let them cook a little longer.
Red Pepper Flakes – this modern addition of mine adds a very slight heat to balance out the tart and sweet notes of most of the vegetables in the sauce. It will not make the ratatouille spicy.

Herb Topping:

Fresh Basil – fresh basil has a spicy herbaceous flavor that will dominate this herb topping. If you dont have fresh you can substitute dry.
Garlic – garlic adds sweetness to balance out the basil when heated.
Sea salt and pepper – salt and pepper in the herb topping will season the vegetables on top of the ratatouille.
Olive oil – olive oil will help the spices and garlic spread evenly over the vegetables.

Steps to make Ratatouille

Once you have assembled the ingredients, use this method:

Assemble Ingredients

Assemble your veggies and slice the zucchini, squash, and tomatoes to 1/4 inch thick.

A cast iron skillet filled with vegetables and herbs, creating a delicious and easy ratatouille.

Sauté Veggies

Heat the olive oil in a heavy bottom oven safe pan then add the onion, garlic, and bell pepper, sauté.

Add Tomatoes

Add the spices then crushed tomatoes and fresh basil.

Simmer

Let simmer about 20 – 35 minutes to let the flavors combine.

squash and eggplant layered over sautéed tomatoes

Assemble

In a large bowl combine all the herb topping ingredients. Add the sliced eggplant, tomato, squash, and zucchini to the bowl and toss to coat the vegetables. Arrange the vegetable slices on top of the sauce alternating. For example, you could do eggplant, tomato, squash, zucchini. Start on the outer edge and work inward.

Bake

Cover the pan with foil and bake for 40 minutes at 375 degrees. Uncover and bake for another 20 minutes or until the vegetable are softened. Top with fresh herbs or parmesan cheese and enjoy!

Tips and Tricks to Perfect Ratatouille

Better Later. This is one of those rare recipes that is actually better the next day. The longer you let the sauce and vegetables sit and hang out together the richer the flavors will become.

Slice evenly. Aim for similar thickness so everything cooks at the same pace (no crunchy bites, no mushy bits).

Fresh is best. For the best possible flavor, it is important to use fresh herbs whenever possible. I keep a hydroponics growing system in my home so I can have fresh herbs even in the dead of winter.

Finish with a drizzle. A little good olive oil at the end (and sometimes a squeeze of lemon) brightens everything up.

Herbs make it taste “classic”. Fresh or dried thyme, oregano, basil go perfectly with ratatouille. Add basil near the end.

Sides to Enjoy with Ratatouille

If you are a veggie lover than try these delicious vegan recipes next!

Air Fried Broccoli

Tahini Roasted Cauliflower

The Best Air Fryer French Fries

Whole Roasted Cauliflower (Easy + Crispy)

Vegan Charro Bean and Rice Soup

Vegan Hashbrown Soup

Vegan Enchilada Pie

Roasted Asparagus in Oven

Click here to see all our recipes using squash!

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Ratatouille Dish FAQs

Leftovers can be kept in an airtight container in the refrigerator for 3-4 days. Reheat in the microwave or the oven.

Yes! Ratatouille is a vegan keto dish that is comprised of keto friendly squash, eggplant, zucchini, and tomatoes. These vegetables are all very low carb and qualify as keto compliant.

While you technically can freeze ratatouille I would not recommend it since eggplant, squash, and zucchini do not freeze well after being cooked and become mushy.

Best Ratatouille Recipe