"for men" sandwich

Rub the cottage cheese with fish and mayonnaise. Mash the eggs with a fork, add chopped onions, mustard, sour cream, salt, pepper and rub until smooth. Cut black and white bread into slices of the same size, cut the crusts. Spread a slice of black bread with curd mass, cover with white bread, grease with egg mass and cover with black bread. Trim sandwiches on the sides, wrap in plastic wrap and put in the refrigerator. Cut the sandwiches diagonally into triangles or across the strips before serving.