Meat loaf with spinach, ham and cheese stuffing

1 1/2 pounds ground beef
1/2 pound ground pork
1/2 small onion, diced
10 mushrooms, diced
1 egg
2 Tablespoons Ketchup
1 Teaspoon garlic powder
1 Teaspoon onion powder
1/2 Teaspoon salt
1/4 Teaspoon pepper
1/4 Cup bread crumbs
4 Slices provolone cheese
6 Slices American Cheese
3 Slices ham
1 10 1/2 ounce package frozen whole leaf spinach, thawed & drained.

Mix all ingredients except ham, cheese and spinach. Roll out to be about 10 X 14.
layer ham on top, then provolone, then spinach, then American cheese.

Roll up and seal the meatloaf ends. Bake at 375 degrees for 1 hour.