1 (6 1/2 oz.) can tuna
1 1/2 tsp. mustard
1/4 tsp. Worcestershire sauce
1/4 c. mayonnaise
1 1/2 tsp. grated onion
2 tsp. green pepper, grated
3 hamburger buns, cut in halves
6 slices tomato
1/2 c. mayonnaise
1/4 c. shredded cheese

Blend first 6 ingredients and place on bun halves. Top with a slice of tomato each. Mix last two ingredients and top tomato. Set under broiler on low until cheese and mayo starts to bubble, approximately 3 minutes.