Created by BudgetCooker on April 20, 2015
Step 1: Preheat oven to 450 F.
Step 2: To make the egg wash, lightly beat an egg with 1 tbsp. of water. Set aside.
Step 3: Place a piece of parchment paper onto your work surface and dust lightly with flour. Lay one thawed sheet puff pastry on top of the paper.
Step 4: Using the back of a teaspoon, brush the dough with mustard leaving a 1-inch border around the edge. Use a ruler if necessary.
Step 5: Staying within the border, add the sliced ham in overlapping layers. Add the cheese.
Step 6: Brush the border with some of the egg wash to create a seal.
Step 7: Place the second sheet of puff pastry on top of the filled pastry lining up the edges.
Step 8: Using a sharp knife, trim the dough so that the edges line up and the square is even. It’s just like cutting the crust off of a sandwich. Make sure to cut the dough in a swift downward motion (think paper slicer). If you drag your knife, it will not rise properly. Press down lightly.
Step 9: Brush the top with more egg wash and cut a few slits in the top to allow steam to escape.
Step 10: Transfer the dough to a baking sheet by lifting up the parchment paper.
Step 11: Bake for 20 to 25 minutes, until puffed and golden brown.
Step 12: Allow to cool for a few minutes and cut into squares (about 12-16 depending how large you want them).
Step 13: Serve hot.