- 1/2 cup grated Parmesan
- 1/2 cup shredded Gruyère or Swiss cheese
- 2/3 cup mayonnaise
- 3 tablespoons finely minced red onion
- 1/8 to 1/4 teaspoon cayenne pepper
- 10-12 slices thin-sliced bread
Ahead of time: In a bowl, mix the cheeses, mayo, onion and pepper, and chill. Trim crusts from bread and toast them lightly on one side under the broiler.
When ready to serve, spread cheese mixture over the untoasted side of the bread. Broil until bubbly and flecked with brown bits. Slice into quarters and serve.