Sprinkle some flour on the bottom of a bowl, place the ball, cover it with a damp cloth and let rise for 2 hours. A hot spot (next to the radiator or inside the oven - light on).
Once the dough has raised, divide it and form 3 inches (6-7 cm) diameter balls.
Roll them out (0.25 inches – 0.5 cm height).
Cut out the dough with a circular cutter (or a mug).
Place a teaspoon of tomato sauce, 2-3 cubes of mozzarella and ½ teaspoon of ham in the center of each circle.
Lightly brush some water over the perimeter edges and fold the dough into a crescent shape. Press with your fingertips to seal.