Place a rack in your oven 6 inches from the broiler and warmth broiler on excessive.
Grease a shallow 9×13-inch baking dish or rimmed sheet pan with softened butter.
Season zucchini with salt and pepper and organize on baking pan. Broil simply till squash is starting to melt, about 4 minutes.
Whereas squash bakes, whisk collectively cream, thyme, garlic powder, parmesan cheese, and flour in a small bowl. Pour combination evenly over squash, then prime with Gruyere cheese and panko breadcrumbs.
Return to oven and broil till golden brown and bubbly, 4-5 minutes. Get pleasure from!
