1. Cut a cucumber in half. Make petals out of it.
2. Put the cucumbers in a bowl, add salt and stir.
3. Squeeze circles out of the bread. Fry them until golden brown in a skillet.
4. Brush the loaf of bread with butter.
5. Squeeze out mayonnaise, put cucumber leaves on it. Follow the procedure for all sandwiches.
6. Arrange the caviar and garnish with parsley leaves.