Active Time

　　25 min

　　Total Time

　　30 min

　　

Ingredients

Makes 40 hors d'oeuvres

　　2 oz finely grated Parmigiano-Reggiano (1 cup)

　　1/2 cup mayonnaise

　　1 tablespoon minced onion

　　1/8 teaspoon cayenne

　　10 slices firm white sandwich bread

　　

Special Equipment

a 1 3/4-inch round cookie cutter; a small offset spatula

　　

Step 1

Put oven rack in upper third of oven and preheat oven to 400°F.

　　

Step 2

Stir together cheese, mayonnaise, onion, and cayenne.

　　

Step 3

Cut out 4 rounds from each bread slice using cutter and arrange on a baking sheet. Bake toasts until tops are crisp and just golden, 3 to 4 minutes. Cool toasts slightly on baking sheet on a rack. (Leave oven on.)

　　

Step 4

Top each toast with a rounded 1/2 teaspoon cheese mixture, spreading to edge with a small offset spatula or knife. Bake toasts until topping is puffed and golden, about 6 minutes.