This Hamburger Hashbrown Casserole is a hearty, comforting dish combining savory defrosted meatballs and hashbrowns in a rich, creamy sauce made with cream of mushroom soup, sour cream, and butter. Enhanced with diced onion and chiles, and topped with cheddar cheese, it bakes into a bubbly, golden main course perfect for family dinners or large gatherings.
To elevate this comforting casserole, consider sautéing the diced onion until translucent and lightly caramelized before mixing it in; this develops a deeper, sweeter flavor profile. For an extra layer of richness, briefly sear the defrosted meatballs in a hot pan to develop some crust. Opt for a sharp cheddar cheese for a more pronounced flavor. Do not overbake, as this can dry out the casserole; it's ready when bubbly and the cheese is golden. A touch of smoked paprika or a dash of hot sauce in the mix can add subtle complexity. Garnish with fresh chives right before serving for a pop of color and fresh oniony bite.