- Preheat oven to 375°. Unroll crescent dough and separate into triangles. On an ungreased 12-in. pizza pan, arrange triangles in a ring with points toward the outside and wide ends overlapping. Press overlapping dough to seal.
- In a large skillet, cook beef over medium heat until no longer pink, 6-8 minutes, breaking into crumbles; drain. Stir in ketchup and mustard. Remove from the heat.
- Spoon beef mixture across wide end of triangles. Top with cheese and pickles. Fold pointed end of triangles over filling, tucking points under to form a ring (filling will be visible). Bake 25-30 minutes or until golden brown. If desired, serve with Thousand Island Dressing.