If you're a fan of quiche, you'll love this ratatouille quiche recipe. It combines the flavors of ratatouille with the creamy and savory goodness of quiche. The crust is filled with a mixture of sautéed eggplant, zucchini, bell peppers, tomatoes, and onions, along with eggs, milk, and cheese. Bake it until the quiche is set and golden brown. It's a perfect dish for brunch or a light dinner.