Instructions
2 tablespoons mayonnaise
1 teaspoon Dijon mustard
4 slices sourdough bread
2 slices Swiss cheese
2 slices Cheddar cheese
2 slices sweet onion
1 medium tomato, sliced
6 slices bacon, cooked
2 tablespoons butter, room temperature
Combine mayonnaise and mustard. Spread on 2 slices of bread. Layer with cheeses, onion, tomato and bacon. Top with remaining slices of bread. Butter each side of the sandwiches and brown on each side until cheese is melted.
