Preheat oven to 375 degrees F. In a large skillet over medium heat, cook ground beef and Italian sausage until browned and crumbled. Drain excess fat. Stir in marinara sauce and Italian seasoning. Simmer for 5 minutes.

In a medium bowl, combine ricotta cheese, 1 cup mozzarella cheese, Parmesan cheese, and beaten egg. Mix until well blended and set aside.

Spray a 9x13 inch baking dish with cooking spray. Spread a thin layer of meat sauce on the bottom. Arrange a single layer of wonton wrappers over the sauce, overlapping slightly to cover the bottom completely.

Spread one-third of the cheese mixture over the wonton wrappers. Top with one-third of the remaining meat sauce. Repeat layers two more times, ending with wonton wrappers and meat sauce on top.

Sprinkle the remaining 2 cups of mozzarella cheese evenly over the top layer of meat sauce.

Cover the baking dish tightly with aluminum foil. Bake for 30 minutes. Remove foil and bake for an additional 15 minutes until cheese is melted and bubbly.

Remove from oven and let stand for 10 minutes before cutting. This allows the layers to set and makes serving easier. Cut into squares and serve hot.