Preheat oven to 375°. In a large skillet, cook and crumble beef with onion and garlic over medium heat until no longer pink, 5-7 minutes; drain. Stir in chili sauce and vinegar. , In a small saucepan, combine water, cream cheese and butter; bring to a boil. Remove from heat; stir in potato flakes., Separate biscuits; press each onto bottom and up sides of a greased muffin cup. Fill with beef mixture; top with mashed potatoes. Sprinkle with potato chips. , Bake until topping is golden brown, 20-25 minutes. If desired, sprinkle with paprika. Freeze option: Freeze cooled pies in a single layer in freezer containers. To use, partially thaw in refrigerator overnight. Reheat on a baking sheet in a preheated 375° oven until heated through, 15-18 minutes.