In a skillet over medium heat, brown the ground beef with chopped onion and garlic. Drain excess grease.
In a bowl, mix cream of mushroom soup, milk, paprika, salt, and pepper.
Layer sliced potatoes at the bottom of the slow cooker.
Add a layer of cooked beef and kidney beans.
Pour some of the sauce over the layer.
Repeat layers until all ingredients are used, finishing with sauce on top.
Cover and cook on LOW for 6–7 hours or HIGH for 3–4 hours.
Sprinkle shredded cheese on top during the last 20–30 minutes.
Serve hot once potatoes are tender and cheese is melted.