Ratatouille and Potato Gratin Recipe – Easy French Summer Bake 2026

This ratatouille and potato gratin recipe combines two classic French dishes into one hearty summer bake. Perfect for using abundant July produce, it features tender aubergine, courgettes, tomatoes, and potatoes layered with herbs.

Why This Ratatouille and Potato Gratin Works

The secret lies in cooking the aubergine separately before layering. As Rachel Roddy recommends, deep-frying, baking, or air frying the aubergine ensures it holds its shape and adds rich flavor. The potato gratin base provides a creamy, satisfying contrast to the vibrant vegetables.

Choosing the Right Aubergine Cooking Method

Each method offers different results. Below is a comparison to help you decide.

Key Tips for Perfect Ratatouille

• Simmer uncovered after the initial covered cook to evaporate excess water.
• Add a pinch of sugar or red-wine vinegar if tomatoes are too acidic.
• Stir deeply to prevent vegetables from clumping and sticking.
• Use fresh, seasonal produce for the best flavor.

Step-by-Step Instructions

Start by preparing the aubergine. Dice it into cubes and cook using your preferred method. Set aside. In a large pot, sauté onions and garlic in olive oil. Add chopped courgettes, bell peppers, and tomatoes. Simmer covered for 10 minutes, then uncover and cook until thickened. Stir in the cooked aubergine.

For the potato gratin, slice potatoes thinly. Layer in a buttered baking dish with cream, garlic, and thyme. Bake at 180°C (350°F) for 40 minutes until golden. Spoon the ratatouille over the top and bake another 15 minutes. Garnish with fresh basil.

FAQ

This ratatouille and potato gratin is a versatile dish that celebrates summer’s bounty. Serve it as a main course with crusty bread or alongside grilled meat. The combination of tender vegetables and creamy potatoes is sure to become a family favorite.