A comforting and easy-to-make gratin featuring thinly sliced yellow squash layered with a creamy Parmesan sauce infused with fresh thyme and garlic, topped with a golden crust.
If the top browns too quickly, tent with foil halfway through baking. For watery squash, salt slices and drain for 10 minutes before mixing. A quick broil for 2 minutes can crisp the top if needed. Breadcrumbs can be omitted or replaced with gluten-free panko for gluten-free version. Fresh thyme is essential for best flavor. Let the gratin rest before serving for better texture.
Keywords: yellow squash gratin, creamy squash recipe, Parmesan gratin, fresh thyme, comfort food, easy side dish, summer squash recipe