Tofu Parmesan Subs

Name: Tofu Parmesan Subs
Ingredients: 1 14-ounce can crushed tomatoes; 1 clove garlic, smashed; 8 fresh basil leaves, torn; Kosher salt and freshly ground pepper; 1/2 cup breadcrumbs; 1/3 cup grated parmesan cheese; 1/2 teaspoon dried Italian seasoning; 1 large egg; 1 12-ounce package firm tofu, drained and sliced into 8 pieces; 2 1/2 tablespoons extra-virgin olive oil, plus more for drizzling; 1 loaf whole-wheat Italian bread, cut into 4 pieces and split in half; 1/4 cup shredded part-skim mozzarella cheese; 1/2 pound baby spinach (about 8 cups)