Stir together the yeast and half the warm water until the yeast dissolves. Leave it aside to rise for about 15 min. or until it starts to look like a cream and is ready. Put the sifted flour and salt in a bowl, make a well in the middle and pour in the yeast mixture, the rest of the water and the rest of the ingredients listed.
Stir with a wooden spoon until all of the flour is absorbed. Sprinkle the counter with flour and knead for 8-10 min. Once the dough becomes firm and stops sticking, hit it on the counter several times.
The dough needs to be smooth and stretchy, with air bubbles visible beneath its surface. It needs to pop back up if you press it with your palm.
Put the kneaded dough in a buttered bowl and cover with a towel. Leave it aside to rise, until doubled in volume. To form the pizza, put the dough in a pizza tray, press with your fingers and spread it out until it covers the entire bottom of the pizza tray.
Leave it for 10 min. before you start adding on toppings. To make a calzone, shape the pizza into a circle. Put toppings in just 1/2 of the circle, leave empty space about 1″ (2.5 cm) from the edge. Cover with the other 1/2 of the circle and press the edges together with your fingers to close it.