In a large bowl, add the warm water and sugar and stir to dissolve the sugar, then sprinkle in the yeast and stir in until that is dissolved. Let this stand for 5 minutes.
Mix together the flour and salt then mix in the oil. When 5 minutes have passed, add the flour mixture to the yeast mixture and stir to form a soft dough. Turn out dough onto a floured work surface and kneed for about 5 minutes until dough is soft and elastic.
Shape dough into a ball and place on a lightly oiled baking sheet, flatten lightly. Cover with plastic wrap and let rise in a warm place for 20 minutes.
While the dough is rising, cook the ground beef in a non stick skillet and break it up as it cooks, season with salt pepper as desired. Drain then add the pasta sauce to the ground beef and mix together.
Heat your oven to 250° C (480° F). Divide the dough into 4 equal parts, pat each one into about a 7 inch circle. Should be able to put 2 on each baking sheet.
Top each pizza with ¼ of the meat sauce, then ¼ of the Mozzarella. Bake for about 18 to 20 minutes or until the cheese is melted and the crust is golden brown. Remove from oven, sprinkle with Parmesan cheese.
Serve.