Best-Kept Secret Ratatouille

By AislePrompt Test Kitchen · Reviewed by AislePrompt Editorial · Published 2026-04-02 · Updated 2026-04-02

A vibrant, layered vegetable medley that's the best vegetarian dish for impressing guests without breaking a sweat—simmered to perfection with herbs. This mediterranean-inspired vegetarian ready in about 65 minutes pairs medium zucchini, medium eggplant, yellow bell pepper for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 180 calories and feeds 6, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

Ingredients

• 2 medium zucchini
• 1 medium eggplant
• 1 yellow bell pepper
• 1 red onion
• 4 cloves garlic
• 2 tbsp tomato paste
• 1 tsp dried thyme
• 1 tbsp fresh rosemary
• 4 tbsp olive oil
• 1/2 tsp salt
• 1/4 tsp black pepper

Instructions

1. Step 1: Preheat oven to 375°F (190°C). Slice 2 medium zucchini and 1 medium eggplant into 1/4-inch thick rounds, then arrange in a single layer on a parchment-lined baking sheet.
2. Step 2: Thinly slice 1 yellow bell pepper and 1 red onion into rings. Mince 4 garlic cloves, then combine with 2 tbsp tomato paste, 1 tsp dried thyme, 1 tbsp chopped fresh rosemary, 1/2 tsp salt, and 1/4 tsp black pepper in a bowl.
3. Step 3: Brush both sides of eggplant and zucchini slices with 2 tbsp olive oil, then arrange over the bell pepper and onion rings in a single layer in a 9x13-inch baking dish.
4. Step 4: Drizzle remaining 2 tbsp olive oil over the vegetables, then spoon the herb mixture evenly over the top. Cover with foil and bake for 30 minutes until vegetables are tender. Remove foil and bake uncovered for 10 more minutes until edges are golden and crisp.