
1 tablespoon olive oil
1 medium onion, finely diced
3 cloves garlic, minced
1 cup marinara sauce
2 tablespoons tomato paste
1 teaspoon Italian seasoning
Salt and black pepper to taste
4 large garlic bread loaves or 8 thick slices garlic bread
1 1/2 cups shredded mozzarella or provolone cheese