Use a knife to cut the rectangle into a large triangle ... cutters to cut stars and ornament shapes out of the pastry. Set ...

Then cut each rectangle in half on the diagonal, creating 12 triangles ... so the pastry is a little cold when it hits the hot oven; this helps the bake hold its shape and puff up better.

Fold opposite puff pastry corners together to form a triangle shape. Use a fork to crimp the edges together by pressing down gently to smoosh both layers together and leave a slight fork shape ...