Microwave directions: toast bread, if desired. Arrange bread on flat microwavable plate or tray. Spread with mayonnaise. Place 1 tomato slice on each bread half. Top with tuna, onion and alfalfa sprouts, dividing evenly. Sprinkle cheese ovee tops. Cover with waxed paper.

Microwave on high for 2-4 minutes or until sandwiches are heated through and cheese is melted, rotating dish once during cooking. Serve topped with avocado slices. Garnish as desired.