Pasta Fagioli with tomatoes

olive oil 200g pancetta (optional) 1-2 garlic cloves 1 sprig of fresh rosemary 2-3 canned tomatoes with their juice 2 small cans of cannellini beans grated[...]

1 cup dried cannellini beans (you can use 3 cups canned, be sure to drain and rinse them first) or 1 cup great northern bean (you can use 3 cups canned, be[...]