On a floured surface, pat or roll dough flat so that it is about 1/2 inch thick. Cut into strips about 8 inches long and 1/2 inch wide. Cover with a dry cloth for 10 minutes. With floured hands, shape each strip to form a heart and place on a greased cookie sheet. Brush with warm water. Sprinkle with salt and sesame seeds. Set, uncovered, in warm place for 10 to 15 minutes to rise. Place a shallow pan of water on bottom shelf of oven. Bake pretzels on center rack at 450ºF. for 15 minutes or until golden brown.