Classic Roast Beef Sandwiches

Number of Servings: 4

1/3 C. Sour cream
2 Tbs. Mayonnaise
1½ Tbs. Prepared horseradish
4 Kaiser or onion rolls, split
4 Lettuce leaves
2 Tomatoes, sliced
½ Pound Thinly sliced, cooked roast beef

Combine first three ingredients; stir well. Spread two tablespoons sauce over top and bottom halves of each roll. Line bottom half with lettuce, top with 2 tomato slices and 2 ounces roast beef, and top half of roll. Wrap in plastic and chill.