This Onion and Mushroom-Stuffed Burger is a delicious twist on a classic burger. The juicy beef patty is stuffed with a flavorful mixture of saut茅ed onions and mushrooms, adding a burst of savory goodness to every bite. Grilled to perfection, this burger is topped with melted cheese and served on a toasted bun. It's a mouthwatering combination of flavors and textures that will satisfy any burger lover.