Heat oven to 400 degrees. In large nonstick skillet, brown ground beef, celery, onion, and bell pepper over medium heat 6 minutes or until outside surface of beef is no longer pink, breaking beef up into 1/2-inch crumbles. Pour off drippings. Stir in barbecue sauce and salt. Simmer, uncovered, 2–3 minutes; stir occasionally. Meanwhile place 1 biscuit into each of 10 ungreased standard-sized muffin cups; press dough firmly onto bottoms and up sides of cups. Spoon approximately 1/4 cup beef mixture into each biscuit cup. Bake in 400-degree oven 10–12 minutes or until edges of biscuits are golden brown. Arrange 2 pieces of cheese on top of each biscuit cup. Continue baking 1–2 minutes or until cheese is melted. Let stand 1 minute. Loosen edges of biscuit cups before removing from pan. Makes 10 biscuit cups.