Cheesy Scalloped Zucchini

Ingredients

• Unsalted butter, softened, as needed
• 1 lb zucchini, thinly sliced
• 2/3 cup heavy cream
• 1 teaspoon dried thyme
• 1/2 teaspoon garlic powder
• 1/2 cup Parmigiano-Reggiano, freshly grated
• 1 1/2 tablespoons all-purpose flour
• 1/2 cup Gruyere cheese, freshly grated
• 1/3 cup panko breadcrumbs
• Kosher salt and freshly ground black pepper, to taste

Preparation