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Home » Recipes » Dinner

Slow Cooker Ratatouille

Published: Oct 28, 2025 by Kate Hackworthy · Leave a Comment

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Dish of slowly cooked mediterranean vegetables with text: How to Make Slow Cooker Ratatouille.
Close up of a dish of vegetables, with text: Slow Cooker Ratatouille.

Easy Slow Cooker Ratatouille is a rustic French vegetable stew that you can enjoy as a main or side dish. It's made entirely in the crock pot, with Mediterranean vegetables simmered slowly with herbs until tender and rich.

Wooden table with a cast iron serving dish of slow cooker ratatouille, next to a bunch of basil and a napkin.

I love a meal that's easy, but impressive. This slow cooker ratatouille fits that bill.

Just chop up the vegetables, mix up the olive oil, herbs and tomato paste, stir it in and come back in 4 or 8 hours to a simmering Provencal stew that's full of great flavour and texture.

Slow cooker ratatouille is a rustic French vegetable stew made by simmering eggplant, zucchini, tomatoes, bell peppers, onions, and herbs until tender and flavorful.

It's cooked entirely in a slow cooker, which makes it simple, hands-off, and perfect for busy days.

The result is a deeply savory, aromatic dish that can be served hot or cold, as a side or a main, and it happens to be naturally vegan and gluten free.

I usually enjoy it on its own, but you can make it a full French feast with Onion Tarte Tatin or Vegetable Galette, and a side of Boulangère Potatoes. Then for dessert, serve some French Sable Cookies!

Jump to:
  • Why You'll Love This Recipe
  • What is Ratatouille?
  • Ingredients
  • Instructions
  • Serving Suggestions
  • Variations
  • Storage
  • Recipe tips
  • FAQ
  • 📖 Recipe
  • 💬 Comments

Why You'll Love This Recipe

  • Crock Pot Ratatouille is completely hands-off once the vegetables are prepped.
  • It's healthy, plant-based, and full of vitamins and fiber.
  • This French stew is budget-friendly and uses simple ingredients.
  • It tastes better the next day, making it ideal for meal prep.
  • It's versatile and pairs well with many mains or grains.
  • Slow cooker ratatouille freezes beautifully for future meals.
  • It works for almost any diet: vegan, vegetarian, gluten free, dairy free, and low calorie.

What is Ratatouille?

Ratatouille comes from the Provence region of France. It's a traditional Provençal vegetable stew that celebrates summer produce.

The name comes from the French words "rata" (a coarse stew) and "touiller" (to stir).

Traditionally, it's cooked on the stovetop or baked in layers, but this slow cooker version is hands-off and tastes just as incredible.

The dish embodies Mediterranean cooking at its best: simple, seasonal ingredients, olive oil, herbs, and a little patience.

Ingredients

Ingredients for ratatouille on a wooden table.
  • Eggplant (Aubergine). Provides texture and depth. You can use Japanese eggplants or omit if you prefer fewer nightshades.
  • Zucchini (Courgette). Adds lightness and a mild sweetness. Yellow squash also works perfectly.
  • Tomatoes. Fresh summer tomatoes are ideal, but canned diced tomatoes are reliable year-round. They add acidity and body to the sauce.
  • Red and Yellow Bell Peppers. Bring color and a gentle sweetness that balances the tomatoes. Green peppers can be used but have a stronger flavor.
  • Onion. Essential for sweetness and aroma. Red, yellow, or white onions all work.
  • Garlic. Adds depth. Use fresh cloves for the best flavor.
  • Olive Oil. Extra virgin olive oil enriches the stew and carries the herbs. You can use avocado oil if preferred.
  • Tomato Paste. Concentrates the tomato flavor and adds umami richness.
  • Herbes de Provence. A key flavor base. If you don't have it, use thyme, oregano, and rosemary instead.
  • Salt and Pepper. Adjust to taste to balance the sweetness of the vegetables.
  • Fresh Basil. Adds brightness and a fragrant finish just before serving.

See the recipe card for quantities.

Instructions

Follow this step-by-step photo tutorial, then scroll down to the recipe card for the full ingredients list and method.

Chopped courgette/zucchini and aubergine/eggplant.

Dice the eggplant, slice the zucchini.

Chopped yellow peppers, red peppers and tomatoes on a cutting board.

Chop the tomatoes and peppers.

Chopped onion and minced garlic on a cutting board.

Slice the onion and mince the garlic.

All the chopped vegetables in a slow cooker.

Add all vegetables and the minced garlic to the slow cooker.

Mixing the tomato paste dressing in a small bowl.

In a small bowl, whisk the olive oil, tomato paste, herbes de Provence, salt, and pepper.

Herb tomato sauce stirring into the vegetables.

Pour the mixture over the vegetables and stir gently to coat everything evenly.

Partially slow cooked ratatouille.

Cover and cook on LOW for 6-7 hours or HIGH for 3-4 hours, until all vegetables are tender but not mushy.

Cooked slow cooker ratatouille in the crock pot.

Before serving, stir once more and top with fresh basil and a drizzle of olive oil.

A spoon in a dish of crockpot ratatouille.

Serving Suggestions

  • Serve over couscous for a light dinner.
  • Spoon over rice or quinoa for meal prep bowls.
  • Layer over polenta for a creamy base. Or serve with a side of Polenta Fries for a modern twist.
  • Toss with pasta for an easy vegetarian main.
  • Use as a topping for baked potatoes.
  • Serve with crusty bread for dipping. If you're short on time, try White Soda Bread.
  • Use it as a pizza topping with mozzarella.
  • Serve chilled as a Mediterranean salad with fresh herbs.

Variations

  • Add chickpeas or white beans for protein.
  • Stir in a handful of spinach or kale at the end for extra greens.
  • Add capers or olives for a briny Mediterranean twist.
  • Mix in cooked quinoa or lentils for a complete meal.
  • Add a splash of balsamic vinegar for tanginess.
  • Include a spoonful of pesto before serving for richness.
  • Try roasted red peppers instead of raw for deeper flavor.
  • Sprinkle with crumbled feta or vegan cheese before serving.
  • Add chili flakes for gentle heat.

Storage

Refrigeration. Store leftovers in an airtight container for up to 5 days. The flavors deepen over time.

Freezing. Portion into containers and freeze for up to 3 months. Thaw overnight in the fridge before reheating.

Reheating. Warm gently on the stovetop or in the microwave. Add a drizzle of olive oil if it looks dry.

Make-Ahead. You can prep all vegetables and seasoning a day in advance and keep them refrigerated in separate containers until ready to cook.

Close up of a serving dish of slow cooker ratatouille.

Recipe tips

  • Choose firm, shiny eggplants for the best texture.
  • Cut vegetables into similar sizes so they cook evenly.
  • Avoid overcrowding smaller slow cookers; use a 5-quart or larger one.
  • Resist lifting the lid too often; it slows cooking.
  • Add basil and any fresh herbs at the end to preserve flavor.

FAQ

Can I make ratatouille without a slow cooker?

Yes. You can cook it in a large pot on the stovetop over low heat for about 45 minutes, stirring occasionally until the vegetables are tender.

Is ratatouille served hot or cold?

It can be served either way. Warm it for comfort food or chill it for a refreshing side dish in summer.

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⭐⭐⭐⭐⭐ If you love this recipe, please leave a five-star rating and review in the comments below! And if you make any modifications, let us know how it went so that we can all benefit from your experience. Happy cooking!

📖 Recipe

Wooden table with a cast iron serving dish of slow cooker ratatouille, next to a bunch of basil and a napkin.

Slow Cooker Ratatouille

Kate Hackworthy | Veggie Desserts
This easy Slow Cooker Ratatouille is a rustic French vegetable stew with Mediterranean vegetables simmered slowly with herbs until tender.
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Prep Time 10 minutes mins
Cook Time 3 hours hrs
Total Time 3 hours hrs 10 minutes mins
Course Dinner
Cuisine French
Servings 6
Calories 149 kcal

Equipment

  • Slow cooker

Ingredients
 

  • 2 aubergine/eggplants diced
  • 2 courgettes/zucchinis sliced
  • 4 medium tomatoes chopped (or 1 can chopped tomatoes)
  • 1 red bell pepper chopped
  • 1 yellow bell pepper chopped
  • 1 large onion sliced
  • 4 cloves garlic minced
  • 3 tablespoons olive oil
  • 1 tablespoon tomato paste
  • 1 teaspoon herbes de Provence
  • salt & pepper
  • fresh basil for garnish

Instructions
 

  • Dice the aubergine/eggplants, slice the courgette/zucchini, chop the tomatoes, chop the bell peppers, and slice the onion. Add them to the slow cooker with the minced garlic.
  • Whisk the olive oil, tomato paste, herbs, salt, and pepper, then pour it over vegetables and stir gently.
  • Cook on LOW for 6-7 hours or HIGH for 3-4 hours, until tender.
  • Finish with fresh basil and a drizzle of extra virgin olive oil.
  • Serve with crusty bread or over couscous.

Nutrition

Calories: 149kcalCarbohydrates: 20gProtein: 4gFat: 8gSaturated Fat: 1gPolyunsaturated Fat: 1gMonounsaturated Fat: 5gSodium: 36mgPotassium: 862mgFiber: 7gSugar: 11gVitamin A: 1557IUVitamin C: 91mgCalcium: 48mgIron: 1mg

The nutritional information provided is approximate and can vary depending on several factors, so is not guaranteed to be accurate. Please see a registered dietician for special diet advice.

Tried this recipe?Mention @kateveggiedesserts or tag #veggiedesserts! I love seeing your recreations.
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Kate Hackworthy in the kitchen

Hi, I'm Kate, a journalist, author and multi-award-winning food blogger. Here you'll find vegetarian recipes and vegan recipes celebrating vegetables, from dinner to dessert! If you love vegetables, you've come to the right place. About Me

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