Cut mozzarella into 8 thin slices. Wash and clean the rocket. Tomatoes and cucumber wash, clean and cut into 16 thin slices each. Spread bread with mustard. Cover 4 slices with 4 slices of ham, 4 slices of cucumber and tomato, rocket and 2 slices of cheese.
Cover with 1 slice of toast each. Cut bread diagonally in half and arrange on boards.