Stretch out the pizza dough and flatten using a rolling pin.
Place the dough into 9.5x13 baking sheet lined with wax paper.
Drizzle dough with the olive oil.
Using a tablespoon, spread tomato sauce over the dough. (You don't have to use all the sauce. Just enough to offer a coating like a pizza.)
Lay the thinly sliced smoked ham on top, then layer on top the slices of cheese.
Roll out the puff pastry (already thawed), and poke it with a fork.
Lay the puff pastry on top of the cheese.
In a small bowl, crack 1 whole egg. Add 2 tablespoons of milk and beat well.
Brush the egg+milk mixture onto the puff pastry.
Bake in 400℉ (200℃) oven for about 20 minutes, or until golden brown on top.
Remove and let cool for 10 minutes, then slice into rectangles (should be about 8 pieces).
Serve immediately or reheat for later.
