Preheat oven to 400 degrees F.

Lay out a large sheet of parchment paper. Lightly flour the paper and a rolling pin. Unfold pastry dough and place on parchment. Roll the dough out to 10-by-15-inch rectangle.

Use a sharp serrated knife to cut off the top corners of the rectangle at a 45-degree angle. Leave about four inches between them.

Next, cut out two triangle notches at the bottom of the dough, leaving four inches between. The whole piece of dough should look like a stumpy Christmas tree.

Finally make 8 cuts about one inch wide, 45-degree angle slices along the sides of the dough. Leave a long strip on dough in the middle.

Transfer the parchment and dough to a large baking sheet.

Spread the mustard on the four inch strip. Top with shredded cheddar and then ham.

Fold the little rectangle at the bottom over the ham. Next take the left side and fold it over the ham followed by the right side. Work your way down, left then right, until the flaps are all folded over the ham.

Lightly brush the top and sides with egg white wash and then top with black pepper.

Bake the bread in the oven for 35 minutes until deeply golden. Let the bread sit for a few minutes before slicing.