Open and turn out sardine in a bowl. You may drain out the oil or leave it depending on your taste. Mash sardines. Add mayonnaise, black pepper and season to your taste. Combine to form a creamy filling.

Take a slice of bread, butter it generously and then add your creamy sardine filling. Cover with an un buttered slice. Press tightly together. Put on chopping board or work surface. Trim the crust of the sliced bread (edges). Then cut diagonally in the middle to get two triangular sandwiches.

Repeat step 2 till all slices are done. Serve and enjoy with beverage of choice.