This French Onion Meatloaf is a hearty and flavorful dish that combines savory onions with tender meat, making it a family favorite you'll want to savor time and again.
Begin by slicing the onions and layer them at the base of a 6-quart slow cooker. Sprinkle salt, pepper, and sugar over the onions, then add butter pieces on top.
Set the slow cooker to LOW heat and cook the onions for about 12 hours until caramelized.
For Meatloaf:
Combine ground beef, bread crumbs, milk, egg, and French onion soup mix in a bowl. Form the mixture into a loaf shape.
Add cooking sherry and Worcestershire sauce over the prepared onions in the slow cooker. Carefully position the formed meatloaf on top of the onions.
Cook on HIGH for about 3 hours, or until the internal temperature of the meatloaf hits 160°F.
Once cooked, place cheese slices on top of the meat and cook for an additional 20-30 minutes until the cheese is melted.
Serve the sliced meatloaf alongside the caramelized onions and sauce drizzled over, garnished with fresh thyme.