Spicy Tuna Sandwich

1 (5 ounce) can tuna, drained

¼ cup mayonnaise

1 ½ teaspoons cream-style horseradish sauce

1 tablespoon chopped dill pickles

2 leaves lettuce

2 slices Swiss cheese

4 slices bread

2 slices tomato

2 thin slices red onion

Combine the drained tuna, mayonnaise, horseradish sauce, and pickles in a small bowl until evenly mixed. Place a slice of Swiss cheese onto 2 slices of bread, and top with a leaf of lettuce. Spread the tuna mixture onto the lettuce leaves. Top with the tomato and red onion slices, and finish with the remaining slices of bread.