Pour the minced beef, egg, bread crumbles, and the spices in a bowl and mix it all together.
Make four evenly big balls of the minced beef, and form them in to hamburgers. You can do this with a hamburger press or by hand.
Cut the camembert cheese and the mushrooms in slices and place them on a plate.
Wash the arugula and place it in a small bowl.
Place the hamburger and the hamburger bread on the grill, and cook them for approx 10 minutes ( 5 minutes on each sides).
Take away the breads and the hamburger from the grill and prepare your hamburger with the cheddar cheese, camembert cheese, arugula and mushrooms.