Easy Instant Pot Vegetable Tian (Ratatouille)

Vegetarian

March 10, 2026

A Taste of Provence, Made Effortlessly!

Channel your inner Parisian chef with this breathtakingly simple Instant Pot Vegetable Tian! Inspired by the classic ratatouille, this dish layers vibrant zucchini, eggplant, and tomato into a beautiful spiral that’s as delightful to look at as it is to eat. Forget hours of oven time; the Instant Pot tenderizes these veggies to perfection in mere minutes, infusing them with garlic and thyme. It’s the ultimate elegant side dish or a wonderfully light and healthy main course that proves healthy eating can be absolutely gorgeous.

(Total Time: 26 MINS| Serves: 6)

Ingredients

• 1 large zucchini, sliced into thin circles
• 1 medium eggplant, sliced into thin circles
• 2 medium tomatoes, sliced into thin disks
• 1 small yellow onion, sliced into thin circles
• 1 tbsp. dried thyme, divided
• Salt and freshly ground black pepper, to taste
• 2 large garlic cloves, finely chopped
• 2 tbsp. olive oil
• 1 tbsp. apple cider vinegar
• 1 cup water

Instructions

1. Directions1. In a large bowl, combine the sliced zucchini, eggplant, tomatoes, and onion. Sprinkle with half of the thyme, salt, and pepper, and toss gently to coat.2. Line a round springform pan with foil. Spread half of the finely chopped garlic evenly across the bottom.3. Arrange the seasoned vegetable slices in a tight, overlapping spiral pattern over the garlic. Alternate between eggplant, zucchini, onion, and tomato to create a colorful design.4. Sprinkle the arranged vegetables with the remaining garlic, thyme, salt, and pepper. Drizzle evenly with the olive oil and apple cider vinegar.5. Place the steamer trivet inside your Instant Pot and pour in 1 cup of water. Carefully lower the springform pan onto the trivet.6. Secure the Instant Pot lid and set the pressure valve to the “Sealing” position.7. Select “Manual” or “Pressure Cook” and cook on “Low Pressure” for 6 minutes.8. Once the cooking cycle is complete, allow the pressure to release naturally for 6 minutes, then perform a quick release to vent any remaining steam.9. Carefully open the lid and lift the pan out of the Instant Pot. Let it rest for a moment before carefully transferring the veggie mixture to a serving plate.

Nutritional Information

• Per Serving: Calories 86 | Total Fat 5.1g | Net Carbs 1.7g | Protein 2.1g | Fiber 4.4g

Pro Tips

• Use a mandoline for perfectly uniform vegetable slices, which helps them cook more evenly.
• For a richer flavor, swap the water in the Instant Pot with vegetable broth.
• After cooking, place the pan under the broiler for 2-3 minutes to get a slight char and browning on top.
• Serve topped with fresh basil, crumbled feta, or a dollop of goat cheese for extra creaminess and flavor.

FAQ

Q: How do I keep the vegetables from getting mushy in the Instant Pot
A: The key to perfectly tender vegetables is the specific cooking method. This recipe uses ‘Low Pressure’ for only 6 minutes, followed by a 6-minute natural release. This gentle, precise timing cooks the vegetables perfectly without turning them to mush.

Q: Can I make this vegetable tian in the oven instead
A: Yes, you can easily adapt this for an oven. Arrange the seasoned vegetables in a baking dish, drizzle with oil and vinegar, and bake at 375°F (190°C) for 35-45 minutes, or until tender. For a browned top, place it under the broiler for the final 2-3 minutes.

Q: What can I serve with this Instant Pot Vegetable Tian
A: This versatile dish is a wonderful side for grilled chicken, fish, or steak. To serve it as a light main course, pair it with crusty bread, quinoa, or rice. Topping it with crumbled feta or goat cheese also adds a delicious richness.

Q: Do I need a springform pan for this recipe
A: While a springform pan makes it easy to transfer the tian, it’s not essential. You can use any oven-safe round dish, such as a cake pan or small casserole dish, that fits inside your Instant Pot on the trivet.

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