Unroll thawed puff pastry onto cutting board dusted with flour.
Roll dough to measure a 10 x 15-inch rectangle. Spread mustard over top of puff pastry all the way to the edges, then add chopped kielbasa over the mustard.
Roll the puff pastry like a jelly roll, starting from the long side. Pinch the seam closed, then refrigerate or freeze until firm enough to slice (Refrigerate 30 minutes or freeze for 15minutes).
Once chilled, slice into ½” pinwheels, and place cut side down onto baking stone.
Bake 15-18 minutes, or until golden brown. Cool 5 minutes. Serve with more honey mustard on the side, if desired.