1. You’ll use the same piece of dough for both the fishtail-braided rim and the crust stars scattered on top. After rolling out a disk of dough into an 11-by-14-inch rectangle, use a pastry wheel to cut fifteen 1/4-inch-wide strips from one of the short sides.
2. To make the braids, take 5 strips and press the tops together. Place 3 strips to one side and 2 to the other. Pick up the outer strip on the side with 3 strips; cross it over, so it’s now on the inside of the side that had 2. (It should now have 3.) Repeat to create a braid -- the outer-third strip always crossing to the middle to join the side with 2 strips. Repeat with the remaining strips to make two more braids.
3. Using the remaining dough, cut out shapes such as stars, snowflakes, and crescents with cookie cutters.