Classic French Bistro Ratatouille with Roasted Vegetables

By , Test Kitchen Director · Reviewed by AislePrompt Editorial · ·

A medley of slow-roasted summer vegetables layered with fresh herbs and tomato sauce, delivering a hearty yet light vegetable stew. This french-inspired vegetarian (vegetarian) ready in about 45 minutes pairs medium, cut into 1-inch cubes eggplant, large, diced red bell pepper, large, diced yellow bell pepper for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 120 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.

Prep: 15 min Cook: 30 min Serves 6 French cuisine 120 cal/serving
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Ingredients

Instructions

  1. Step 1: Preheat oven to 400°F. In a large bowl, toss 1 medium eggplant cut into 1-inch cubes, 2 medium zucchini sliced into 1/2-inch rounds, 1 large diced red bell pepper, and 1 large diced yellow bell pepper with 4 tbsp olive oil, 1 1/2 tsp salt, and 1 tsp black pepper.
  2. Step 2: Spread the vegetables evenly on a large baking sheet and roast for 25 minutes, stirring halfway through until tender and lightly caramelized on the edges.
  3. Step 3: While vegetables roast, heat 1 tbsp olive oil in a saucepan over medium heat. Add 4 minced garlic cloves and 1 tbsp chopped fresh thyme, sautéing for 1 minute until fragrant.
  4. Step 4: Stir in 2 cups tomato sauce and simmer for 5 minutes until warmed through.
  5. Step 5: Combine the roasted vegetables with the tomato sauce in a serving dish and gently fold in 1/4 cup chopped fresh basil. Serve warm or at room temperature as a classic French bistro side or main.

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Frequently asked questions

How long does Classic French Bistro Ratatouille with Roasted Vegetables take to make?

Total time is about 45 minutes (15 min prep + 30 min cook). Most home cooks find this fits comfortably into a weeknight; double the batch on Sunday for two dinners.

How do I store leftover Classic French Bistro Ratatouille with Roasted Vegetables?

Cool to room temperature within 2 hours, then store in an airtight container in the fridge for up to 4 days. Reheat covered in a 350°F oven for 10-12 minutes, or microwave at 70% power in 60-second bursts to keep large, diced red bell pepper from drying out.

Can I substitute ingredients in Classic French Bistro Ratatouille with Roasted Vegetables?

Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.

How do I scale Classic French Bistro Ratatouille with Roasted Vegetables for a different number of people?

The recipe is written for 6 servings. Multiply each ingredient by (your serving target / 6). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.

Is Classic French Bistro Ratatouille with Roasted Vegetables vegetarian?

Yes — this recipe is tagged vegetarian based on its ingredient list. Always cross-check labels for packaged ingredients (sauces, broths, condiments) since formulations vary by brand.