In a large skillet or Dutch oven, over medium heat, add oil. Cook garlic and onion until fragrant, 1 minute. Add anchovies and cook 1 minute. Add Tuttorosso Crushed Tomatoes Roasted Garlic and Tuttorosso Petite Diced Tomatoes, olives and red pepper flakes. Add in olive juice. Let come to a simmer, stirring often, about 15-20 minutes. Salt and pepper to taste.
Meanwhile, add oil to a pan and let it heat. Add flour to a bowl and drain capers. Add capers to flour and coat evenly. When the oil is hot, add capers. Cook for about 3-5 minutes or until they start to brown and crisp. Remove and place on a paper towel to remove excess oil.
Add a thin layer of Puttanesca sauce to sour dough bread. Add fried capers, mozzarella and a few sprigs of basil. Add a piece of bread on top. Add oil or butter to a pan and add sandwich. Cook on medium heat for 3-5 minutes per side or until cheese is melted and bread is nicely browned. Remove and serve immediately.
