Combine hamburger, pizza sausage, diced green pepper, diced onion, and mushrooms in a skillet.

Cook the mixture over medium heat until the meat is browned and the vegetables are softened, drain off any excess fat.

Stir in garlic powder, salt, pepper, pizza sauce, Italian seasoning, fennel seasoning, and hot pepper (to taste).

Mix all the ingredients together well.

Divide the meat mixture among French bread loaves or rolls.

Top each sandwich with mozzarella cheese.

Wrap the sandwiches in foil.

Bake in a preheated oven at 350°F (175°C) for 8 to 10 minutes, or until the cheese is melted and bubbly.