Ingredients

• 10 very thin slices firm white sandwich bread
• 2 tablespoons unsalted butter, melted
• 1/2 cup sour cream
• 100 g (3 1/2 oz) caviar (preferably osetra)
• a 2-inch crescent-moon cookie cutter

Instructions

1. Preheat oven to 350°F. Brush bread with melted butter and cut out 40 moons. Arrange, buttered sides up, on a large baking sheet and bake in middle of oven until pale golden, about 10 minutes. Cool completely.
2. Serve toasts topped with sour cream and caviar.