In large bowl combine tomatoes, spinach, pepperoni, salami, mozzarella cheese, ricotta cheese. olives, parmesan cheese, garlic powder, basil, oregano and pepper; set aside filling. Cut each bread loaf in half. On lightly floured board, roll one bread dough half into a 12 inch circle. Place on pizza pan. Spread 1 1/3 c filling on 1/2 of dough circle to within 1/2 inch of edge. Fold dough over filling making half circle. Press edges with fork to seal. Cut 3 slits in dough to allow steam to escape. Repeat process making 3 more calzones. Bake in preheated 350 F oven for 20 minutes. Brush with olive oil. Bake an additional 5 to 10 minutes or until golden brown. Let stand 10 minutes before cutting.