Provence-Style Slow-Simmered Ratatouille

By AislePrompt Test Kitchen · Reviewed by AislePrompt Editorial · ·

A vibrant French vegetable medley that evolves through low-and-slow cooking, honoring authentic Provençal technique with layered textures and seasonal produce. This mediterranean-inspired vegetarian (vegan) ready in about 70 minutes pairs medium eggplant, medium zucchini, red 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 4, 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.

★ 3.7 (15 ratings) Prep: 25 min Cook: 45 min Serves 4 Mediterranean cuisine 180 cal/serving
Plan a meal with the AI → Shop this recipe on Instacart → Shop equipment ↓

Ingredients

Instructions

  1. Step 1: Preheat oven to 375°F (190°C). Slice 1 medium eggplant and 1 medium zucchini into 1/4-inch thick rounds, then place in a single layer on a parchment-lined baking sheet. Drizzle with 1 tbsp olive oil, sprinkle with 1/4 tsp sea salt, and toss to coat.
  2. Step 2: Roast for 20 minutes until tender and golden at edges, turning halfway through until the vegetables show slight caramelization.
  3. Step 3: Sauté 1/2 diced yellow onion and 1 sliced red bell pepper in 1 tbsp olive oil over medium heat for 8 minutes until translucent and fragrant.
  4. Step 4: Add 2 diced medium tomatoes and 1 tsp fresh thyme to the onion mixture, cooking for 5 minutes until tomatoes break down into a thick sauce. Stir in the roasted vegetables and 1/2 tsp sea salt, then transfer to a baking dish.
  5. Step 5: Cover with foil and bake at 375°F (190°C) for 25 minutes until vegetables are tender and flavors meld, uncovering for the last 5 minutes to set the top.

Equipment for this recipe

Top-rated tools to make this recipe successfully.

More Bakeware & baking tools → Shop all kitchen tools →

Frequently asked questions

How long does Provence-Style Slow-Simmered Ratatouille take to make?

Total time is about 70 minutes (25 min prep + 45 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 Provence-Style Slow-Simmered Ratatouille?

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 medium eggplant from drying out.

Can I substitute ingredients in Provence-Style Slow-Simmered Ratatouille?

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 Provence-Style Slow-Simmered Ratatouille for a different number of people?

The recipe is written for 4 servings. Multiply each ingredient by (your serving target / 4). 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 Provence-Style Slow-Simmered Ratatouille vegan?

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

What others are saying