Preheat oven to 425 degrees F. Lightly grease two large baking sheets. Unroll pizza dough on a lightly floured surface. Using your hands, shape dough into a 12x9-inch rectangle. Brush the dough with some of the egg. Sprinkle with seeds and lightly sprinkle with salt. Use a floured long knife or floured pizza cutter to cut dough crosswise into 1/4- to 1/2-inch wide strips.
Place strips on prepared baking sheets. Bake, one sheet at a time, for 8 to 10 minutes or until golden brown. Cool on wire racks. Makes about 24 breadsticks.