1) prepare catsup; juice enough grapefruit to make 2 cups. Pour juice into saucepan along with tomato paste, catsup, cornstarch and hot pepper sauce. Bring to boil, stirring constantly; cook 2 to 3 minutes. Keep warm.
2) Dip ribs in beaten egg; then roll in seasoned crumbs. Arrange on foil covered broiler pan. Drizzle butter over ribs.
3) Broil 4 to 6 inches from heat until crisp and brown (about 10 minutes), turning frequently and basting with drippings. Serve with warm grapefruit catsup as a dip.