Peel, cut up and boil potatos until tender. In meantime brown and crumble bacon, saute onion and garlic until tender. Mash potatos with sour cream butter salt and pepper to taste. Fold in crumbled bacon sauteed onion and garlic and 1 c. cheese. Put into 9x13 in. buttered baking pan. Top with remaining shredded cheese. Bake at 350 for 30 minutes until bubbly.