French-Inspired Slow Cooker Ratatouille with Fresh Herbs

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

A rustic vegetable stew slow-cooked to tender perfection, combining eggplant, zucchini, peppers, and tomatoes with fragrant herbs for a hearty French classic. This french-inspired slow cooker (vegetarian) ready in about 440 minutes pairs large, cut into 1-inch cubes eggplant, large, chopped red bell pepper, large, chopped yellow bell pepper for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 150 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: 20 min Cook: 420 min Serves 6 French cuisine 150 cal/serving
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Ingredients

Instructions

  1. Step 1: In a large skillet, heat 3 tbsp olive oil over medium heat. Add 1 large diced yellow onion and 4 minced garlic cloves, sautéing for 4-5 minutes until fragrant and translucent.
  2. Step 2: Transfer the sautéed onion and garlic to a slow cooker. Add 1 large cubed eggplant, 2 sliced medium zucchinis, 1 large chopped red bell pepper, 1 large chopped yellow bell pepper, 14 oz canned diced tomatoes, and 2 tbsp tomato paste.
  3. Step 3: Stir in 1 tbsp chopped fresh thyme, 1 1/2 tsp salt, and 1 tsp black pepper. Cover and cook on low for 6-7 hours until vegetables are tender and flavors meld.
  4. Step 4: Just before serving, stir in 1/4 cup chopped fresh basil for a bright herbal finish.

Equipment for this recipe

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Frequently asked questions

How long does French-Inspired Slow Cooker Ratatouille with Fresh Herbs take to make?

Total time is about 440 minutes (20 min prep + 420 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 French-Inspired Slow Cooker Ratatouille with Fresh Herbs?

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 yellow onion from drying out.

Can I substitute ingredients in French-Inspired Slow Cooker Ratatouille with Fresh Herbs?

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 French-Inspired Slow Cooker Ratatouille with Fresh Herbs 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 French-Inspired Slow Cooker Ratatouille with Fresh Herbs 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.

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