Heat 4 tablespoons EVOO in small pan over medium-low heat with anchovies, if using. Melt anchovies into oil until they dissolve then add garlic and stir 2 minutes then add breadcrumbs and stir and cook until deeply golden in color. Stir in zest of 2 lemons and parsley and crushed red pepper flakes. Turn off heat and transfer to a bowl.
Heat a large pot of water to a boil for pasta.
Heat a large skillet over medium heat with 2 tablespoons EVOO, couple of turns of the pan. Add celery, onions and 2 cloves garlic to the pan and cook until just tender, 5 minutes. Add white beans and rosemary and heat through 2 to 3 minutes more. Add wine, vermouth or broth, flakes tuna and tomato, if using. Stir 2 minutes then turn off heat.
Just before draining the pasta, add a ladle of starchy cooking water to pan along with the drained pasta, toss to combine. Serve in shallow bowls with lots of breadcrumbs and a drizzle of oil on top.