Potatoes Supreme
["6 medium potatoes", "1/2 c. melted margarine", "2 c. Cheddar cheese", "1/3 c. green onions or red onions", "1 pt. sour cream", "1/2 tsp. pepper", "1/2 tsp. salt"]
["Cook potatoes in small amount of salted water; drain and refrigerate until cool. Chop potatoes coarsely. Mix well with remaining ingredients. Bake in 1 1/2-quart dish at 350\u00b0 for 30 minutes."]
["potatoes", "margarine", "Cheddar cheese", "green onions", "sour cream", "pepper", "salt"]