Roasted Ratatouille with Pan-fried Onions

Fragrant layers of bright zucchini, tender Japanese eggplant, and juicy romas - all roasted to perfection in a nest of herby, garlicky tomatoes and pan-fried onions. 

No one makes ratatouille like I do. In fact, it seems like E-V-E-R-Y-O-N-E puts their own flare on this simple summer vegetable medley. My personal spin? Pan-fried onions for extra sweetness and depth of flavor. SO GOOD!

This post may contain affiliate links, but don't worry - they won't bite.

Originally from the South of France, ratatouille is an amazingly versatile dish, both for the cook and as a meal. Traditionally made with a base of tomatoes, zucchini, onions, eggplant, garlic, and herbs, home chefs around the world add everything from potatoes to porcinis to the mix.

Some cook it in a pot on the stove, others roast it in the oven. You can even make it in a slow cooker, or an Instant Pot! The whole idea is, once you have the basic recipe down, feel free to make it your own.

And here's a little secret... (shhhhh....)

When it comes to making ratatouille, it really doesn't matter how you put it together. 

It's true! Whether you choose to "fussy up" and camera-ready your ratatouille, or just throw everything in the dish and let the chips fall where they may, the fragrant flavors of all those fresh summer veggies and herbs will magically combine to create something your tastebuds will love.

Ratatouille can be enjoyed hot, cold, or somewhere in between. Serving suggestions are just as flexible, too: as is, over rice, on toast, in pasta, on a sandwich, and with eggs are just a few ideas. (One of our favorite breakfasts is leftover ratatouille with poached eggs.) Enjoy!

Roasted Ratatouille Ingredient Notes

Fresh is Best: Ratatouille is best when made with the freshest veggies possible.

Uniform Slices: Be sure to slice your vegetables uniformly to all be approximately the same size and thickness so that everything cooks evenly.

Japanese Eggplant is more tender than Italian eggplant, and works better for this dish. However, if you cannot find it, you can definitely use Italian eggplant as a substitute. The important thing is to cut it in approximately the same size as the other veggies you will be using so everything cooks evenly.

Marry the Flavors: Ratatouille and similar foods (i.e., spaghetti sauce, lasagna, and eggplant parm) almost always taste better "the next day," after flavors have had a chance to marry and mellow.

I'm sure that there is a scientific explanation for this phenomena, but whatever the reason, keep this in mind if you plan to serve this dish to company. We often make meals like this a day ahead of time, refrigerate overnight and reheat to serve.

5 from 1 vote

Ratatouille with Pan-Fried Onions

Fragrant layers of bright zucchini, tender Japanese eggplant, and juicy romas - all roasted to perfection in a nest of herby, garlicky tomatoes and pan-fried onions. 

Print Recipe Pin Recipe

Course: Main Course

Cuisine: Vegan, Vegetarian

Prep Time:45 minutes

Cook Time:1 hour

Total Time:1 hour 45 minutes

Servings: 4

Calories: 124kcal

Author: Renee

Ingredients

US Customary - Metric

• 1 large red onion sliced ⅜" thick
• 4 teaspoons extra virgin olive oil divided
• 14 ounces crushed or diced tomatoes (1 can, drained)
• ½ teaspoon apple cider vinegar
• 2 cloves minced garlic about 1 ½ teaspoons
• 1 Tablespoon fresh basil chiffonade
• ½ teaspoon dried oregano
• ½ teaspoon dried thyme
• ¼ teaspoon dried rosemary or a small spring fresh, chopped
• ½ teaspoon salt
• ¼ teaspoon black pepper
• ¼ teaspoon chili powder
• 1 lb medium zucchini sliced ¼" thick
• 1-2 Japanese eggplant sliced ¼" thick
• 3 fresh Roma tomatoes sliced ¼" thick

Garnish:

• Fresh basil
• Finely grated Parmesan or Romano cheese optional

Instructions

• Preheat oven to 350°F. Spray a deep-dish pie plate with cooking spray. Set aside. 
• Heat a cast iron or heavy skillet over medium-high heat. Add 2 teaspoons  of olive oil and swirl to coat skillet.

  When a water droplet sizzles on the surface, carefully place whole onion slices on the skillet.

  llow onion slices to brown and crisp on one side for a few minutes, and then carefully turn them over using a spatula and brown the other side.

  Allow onion slices to cool, and then separate onion rings from one another and set aside. 
• In a small bowl, combine dried oregano, thyme, rosemary, salt, pepper, and chili powder.
• In a medium bowl, combine crushed or diced tomatoes, remaining olive oil (2 teaspoons), vinegar, garlic, fresh basil, and all but 1 teaspoon of the herb mixture. 
• Pour tomato mixture evenly into the bottom of a deep dish pie plate. (I use my cast iron pie dish.) 
• Arrange sliced veggies around the edge of the plate in a pattern that makes you happy. (I did tomato-zucchini-eggplant-zucchini-eggplant-repeat.) 
• Put the pan-fried onion mixture in the middle of the veggie-ring. Arrange more veggies in the middle, until you are either out of veggies or space, whichever comes first. 
• OPTIONAL: At this point, you can spray the whole thing with a little cooking spray or brush it with just a bit of olive oil to encourage browning if you would like. Doing so also seems to make the whole thing look better after it is done roasting. 
• Sprinkle remaining dried herb mixture over the top of the prepared ratatouille. 
• Bake in preheated oven for an hour, or until the sauce is bubbly and the veggies are tender (but not mushy!!) 
• Garnish with fresh basil and freshly grated Parmesan or Romano. 

Notes

Weight Watchers: 1 serving (¼ recipe) = 1 SmartPoint [2018]

Alternate (aka "non-fussy") Prep: Put the crushed tomato mixture in your baking dish. Top with pan-fried onions. Throw the veggies on top. Bake as directed.

Nutrition

Calories: 124kcal | Carbohydrates: 19g | Protein: 4g | Fat: 5g | Saturated Fat: 1g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 3g | Sodium: 438mg | Potassium: 883mg | Fiber: 6g | Sugar: 12g | Vitamin A: 914IU | Vitamin C: 40mg | Calcium: 79mg | Iron: 2mg

This website provides approximate nutrition information for convenience and as a courtesy only. You are solely responsible for ensuring that any nutritional information provided is accurate, complete, and useful.

Have you tried this recipe?Mention @TheGoodHeartedWoman or tag #thegoodheartedwoman!

If this ratatouille sounds good, be sure to try out our recipes for Eggplant Parmesan and Indian Eggplant Pickling Style LIGHT (Lake Palace Hotel Aubergine), too! 

Disclosure: This post may contain affiliate links, including Amazon affiliate links, which means we may receive a commission if you click a link and purchase something that we have recommended. While clicking these links won't cost you any extra money, they do help keep this site up and running. As always, all opinions and images are my own. Please check out our disclosure policy for more details. Thank you for your support!