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–+ servings

Oven Roasted Ratatouille

 Cost $6.48 recipe / $0.81 serving
4.78 from 67 votes
This Oven Roasted Ratatouille is packed with layers of fresh veggies, marinara sauce, and melty cheese. A simple, cozy side dish that tastes like comfort!
Step-by-step videos can be seen below the recipe card.
Author: Beth Moncel
Overhead view of a baking dish filled with layers of oven roasted ratatouille.
Servings 8 servings (¾ cup each)
Prep 20 minutes
Cook 45 minutes
Total 1 hour 5 minutes
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Ingredients

  • 1 cup marinara sauce ($0.49*)
  • 1 yellow onion (thinly sliced, (170g, 1¼ cup) $0.90)
  • 1 eggplant (thinly sliced, (about 1 lb, 450g, 3 ½ cups), $1.56)
  • 1 zucchini (thinly sliced, (about ½ lb, 227g, 2 cups) $0.74)
  • 1 yellow squash (thinly sliced, (about ½ lb, 227g, 2 cups) $0.84)
  • 3 Roma tomatoes (thinly sliced, (360g, 2 ½ cups) $0.87)
  • 1 Tbsp olive oil ($0.18)
  • ½ tsp dried basil ($0.25)
  • ½ tsp dried oregano ($0.03)
  • ⅛ tsp black pepper (freshly cracked, $0.03)
  • ⅛ tsp salt ($0.01)
  • 1 cup mozzarella (shredded, $0.97)
  • 1 Tbsp fresh parsley (chopped (optional), $0.05)

Video

Instructions 

  • Gather all your ingredients and preheat the oven to 400ºF.
  • Thinly slice the yellow onion. Slice the eggplant, zucchini, yellow squash, and tomatoes into ⅛-inch thick slices. Cut any pieces with a larger diameter into half-rounds.**
  • Pour the marinara in the bottom of a large casserole dish. Sprinkle the sliced onions over top.
  • Begin to line up the sliced eggplant, zucchini, squash, and tomatoes into the dish, standing on their sides, and in an alternating pattern until all of the pieces are used up. Drizzle the olive oil over the vegetables, then sprinkle the basil, oregano, salt, and pepper over top.
  • Transfer the dish to the oven and roast the vegetables for 40 minutes. After 40 minutes, remove the dish from the oven and sprinkle the shredded mozzarella over top. Return the casserole dish to the oven for five minutes, or until the cheese is melted and creamy.
  • After roasting, sprinkle the chopped parsley over top, then serve.

See how we calculate recipe costs here.

Equipment

  • 9x13 Baking Dish

Notes

*You can use any marinara sauce you like. Store-bought marinara sauce makes this recipe super easy to throw together, whereas homemade marinara sauce adds a rich flavor that makes the dish taste extra special (and you can alter it to suit your tastes!)
**Try to purchase vegetables that are a close size in diameter to make layering easier.
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Nutrition

Serving: 1servingCalories: 99kcalCarbohydrates: 9gProtein: 5gFat: 5gSodium: 275mgFiber: 3g
Read our full nutrition disclaimer here.
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