Unroll one can of crescent roll dough and lay it flat into the bottom of a greased 9x13-inch baking dish, pressing the seams together to create a uniform layer.
In a bowl, mix together the Dijon mustard, olive oil, garlic powder, oregano, salt, and pepper. Spread this mixture evenly over the crescent roll layer in the baking dish.
Layer the sliced turkey or chicken evenly over the mustard mixture, followed by the sliced ham.
Sprinkle the shredded cheese generously over the meats, ensuring an even distribution.
Unroll the second can of crescent roll dough and place it over the cheese layer, pressing the seams together to seal.
Optional: Brush the top layer with a bit of olive oil and sprinkle sesame seeds if desired for added flavor and crunch.
Bake in the preheated oven for 25-30 minutes, or until the top is golden brown and the cheese has melted.
Allow to cool slightly, then cut into squares for serving.
Notes
Optional sesame seeds can be added for extra flavor.