Provençal baked zucchini gratin: sliced zucchini sautéed with sweet onions, layered with rice, crème fraîche, fresh thyme, and baked with a generous crust of melted Gruyère cheese.
Sauté diced onion and sliced courgettes in olive oil for 8 minutes until softened. Drain excess liquid.
In a bowl, whisk crème fraîche, beaten eggs, garlic, thyme, uncooked rice, salt, and black pepper. Stir in sautéed courgettes.
Transfer into an oiled baking dish. Scatter grated Gruyère across the top.
Bake at 190°C for 35 minutes until the rice has absorbed the savory juices, the zucchini is tender, and the cheese top is bubbling and browned.