Cook all of the beans in two quarts of water until tender; drain and reserve the fluid. Put half of the beans through a food mill, putting the pulp back into the reserved fluid and discarding the skins. Meanwhile, saute onion until transparent in olive oil; add chopped parsley and garlic slices and add to the bean pulp and wat mixture. Add more water if necessary and season with salt and pepper to taste. Add the raw macaroni and cook until tender. Then add remaining cooked beans and heat through. The consistency should now be of a hearty soup. Serve piping hot drizzling olive oil on top of each bowl. A sprinkling of fresh grated Locatelli cheese is optional, but adds delicious flavor. A wonderful dinner when served with a crispy green salad, crusty Italian bread, and a bottle of your favorite wine.