Savor the flavors of summer with this delightful Golden Summer Squash Gratin recipe! Packed with fresh summer squash, zucchini, and creamy Gruyère cheese, this dish is a perfect side for any meal. Easy to make and deliciously comforting, it's sure to impress your family and friends.
3 medium yellow summer squash, thinly sliced
2 medium zucchinis, thinly sliced
1 small onion, finely chopped
2 cloves garlic, minced
1 cup heavy cream
1 cup shredded Gruyère cheese
1/2 cup grated Parmesan cheese
1 teaspoon fresh thyme leaves (or 1/2 teaspoon dried thyme)
Salt and pepper to taste
1 tablespoon olive oil
1/2 cup breadcrumbs (for topping)
1 tablespoon fresh parsley, chopped (for garnish)