Tartines de Caviar à la Crème Aigre recipe from epicurious
Active time: 25 min Start to finish: 25 min
2 large eggs, hard-boiled
1/4 cup minced white onion
1 cocktail pumpernickel loaf
1/2 cup sour cream
150 g caviar (5 ounces; preferably oscietra)
Force eggs through a sieve into a small bowl and gently toss with onion.
Trim 36 pumpernickel slices to 1 1/4-inch square, then top each with 1/2 teaspoon sour cream, 1/2 teaspoon egg, and 1/2 teaspoon caviar.