One-Pan Ratatouille with Roasted Vegetables

By AislePrompt Editorial · Published 2026-05-14 · Updated 2026-05-14

Colorful summer vegetables roasted together in a single pan with herbs and garlic to develop deep, caramelized flavors. This French-inspired vegetarian recipe, ready in about 50 minutes, pairs eggplant, zucchini, red bell pepper for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 140 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

• 1 medium (about 1 lb), cut into 1-inch cubes eggplant
• 2 medium, sliced into 1/2-inch rounds zucchini
• 1 large, chopped into 1-inch pieces red bell pepper
• 1 large, chopped into 1-inch pieces yellow bell pepper
• 3 medium, quartered tomatoes
• 3 tbsp olive oil
• 5 cloves, minced garlic cloves
• 1 tsp, chopped fresh rosemary
• 1 tsp fresh thyme leaves
• 1 tsp salt
• 1/2 tsp black pepper

The sheet pan we’d roast this on → Best Sheet Pans in 2026: Top Picks + Buying Guide

Instructions

1. Step 1: Preheat oven to 425°F. In a large mixing bowl, combine 1 medium eggplant cut into 1-inch cubes, 2 sliced zucchinis, 1 chopped red bell pepper, 1 chopped yellow bell pepper, and 3 quartered tomatoes.
2. Step 2: Add 3 tbsp olive oil, 5 minced garlic cloves, 1 tsp chopped fresh rosemary, 1 tsp fresh thyme leaves, 1 tsp salt, and 1/2 tsp black pepper to the vegetables. Toss thoroughly to coat.
3. Step 3: Spread the vegetable mixture evenly on a large rimmed baking sheet or roasting pan in a single layer. Roast in the oven for 30-35 minutes, stirring halfway through, until the vegetables are tender and edges caramelize.
4. Step 4: Remove from oven and let cool slightly before serving as a side or over rice.