Marinated Beef Strips
["1 lb. cooked roast beef, thin sliced", "1 1/2 tsp. salt", "1/2 tsp. pepper", "1 Tbsp. lemon juice", "2 onions", "2 c. sour cream"]
["Cut beef into thin strips; cut onions into thin slices and separate into rings.", "Combine beef, onion, salt and pepper. Sprinkle with lemon juice; stir in sour cream.", "Chill.", "Serve on lettuce-lined dish with rye bread."]
["cooked roast beef", "salt", "pepper", "lemon juice", "onions", "sour cream"]