This blueberry grilled cheese is a warm, melty, and beautifully balanced sandwich that pairs gooey cheese with sweet-tart blueberries. The buttery toast gets crisp and golden while the blueberry filling turns jammy, creating a sweet-and-savory comfort food ideal for breakfast, brunch, or an elevated snack. This recipe is simple, quick, and perfect for anyone who wants a gourmet twist on classic grilled cheese.