Brown sausage with garlic powder, Italian seasoning and scant salt, if any.
Add can of diced tomatoes with juice, tomato sauce, and basil. Let cook for a while to meld flavors. Add Mozzarella cheese and stir to melt. Consistency should be a bit pasty. Keep on very low flame while you toast the bread.
Brush one or both sides of 3/4 inch sliced Italian bread with olive oil (I use avocado oil) and toast in frying pan over medium-high heat. When toasted, add a goodly portion of the meat mixture on top of the bread. Cover with a slice of Provolone and put in heated oven to melt. Serve hot.