Brown Beef: In a skillet, cook ground beef and diced onion over medium heat until beef is browned. Drain any excess fat.
Prepare Sauce: In a bowl, mix cream of mushroom soup, milk, garlic powder, paprika, salt, and pepper.
Layer Ingredients: In the slow cooker, layer half of the sliced potatoes, half of the cooked beef mixture, and half of the cheese. Repeat layers with remaining ingredients.
Add Sauce: Pour the soup mixture evenly over the layers in the slow cooker.
Cook: Cover and cook on low for 5-6 hours, or until potatoes are tender and cooked through.
Serve: Garnish with fresh parsley before serving. Enjoy warm!
