Roast Beef Sandwich

Ingredients:

3 oz. roast beef, diced
2 tbsp. chopped celery
1/8 tsp. chopped chives
1/2 tbsp. lemon juice
1/2 med. tomato, chopped
1/2 tsp. salt
1/4 tsp. pepper
1 tsp. diet mayonnaise
2 slices thin bread
Lettuce

Combine all ingredients except bread and lettuce. Mix well. Spread on one slice of bread. Top with lettuce and remaining bread.