Cheesy Zucchini Gratin

1. Preheat oven to 400 degrees F (200 degrees C).

2. Mix Gruyere cheese and panko bread crumbs together in a bowl.

3. Heat butter in a large skillet over medium heat until melted. Add zucchini, yellow squash, shallots, and garlic; cook and stir until softened, about 10 minutes. Stir in basil, rosemary, salt, and black pepper; cook until fragrant, about 1 minute.

4. Mix flour into the skillet. Pour in cream in a steady stream and stir until thickened, 3 to 5 minutes. Mix in half the cheese mixture. Remove from heat.

5. Pour zucchini mixture into a baking dish. Top with remaining cheese mixture.

6. Bake in the preheated oven until bubbly and golden brown, about 20 minutes.

Cook's Note:

Use green or yellow squash, or both.