If you do not have a mold, roll dough into small discs, place filling in the center and fold over to form a crescent shape. Seal the edges well by pressing well after moistening them with water and press with fork at the edges for a fluted edge look.
Heat oil for deep frying and once the oil is hot, reduce the flame to medium low and gently fry on low heat, turning often until the gujiyas are golden and crisp.