Using bread flour to make a simple dough, this stromboli-like bread is filled with drained, flaked, canned tuna and marinated, chopped cherry tomatoes. The dough is left to rise for two hours before it's rolled out and spread with the mixture. Once it's rolled up and sealed, it's transferred to a parchment-lined baking sheet and transferred to the oven to cook until golden. Simply slice and serve it warm.