Directions Spray broiler pan with nonstick cooking spray. Preheat broiler. In small saucepan, combine margarine, lemon juice and oil. Add shallots and parsley; cook 2 minutes. Sprinkle tuna with salt and pepper. Press one side of tuna into shallot mixture; place on prepared pan, coated side up.
Combine tuna, onion, celery, relish, and mayonnaise. Spread hamburger buns with margarine; top with tuna mixture. Top each with a slice of cheese. Preheat oven broiler. Broil 5 inches from heat for 4 minutes or until cheese melts.