Unroll and spread the pizza dough over a lightly floured surface, forming a 14x9-inch rectangle. Spread the mustard over the surface of the dough. Arrange the slices of ham over the dough and sprinkle with shredded cheese. Roll the dough up, starting at the widest end, in the form of a burrito, leaving the folded side down. Cut into 1-inch slices and arrange them in the form of a rosca on the greased baking sheet.