Large pot, heat 1 tbl spoon oil, medium heat. Add sausage &onion; cook, stirring, until softened, 10min. Add beans with liquid, tomatoes with juices, 2cups water, 1/4 tsp salt, 1/4 tsp pepper. Bring to boil; add pasta. Reduce heat to medium-low. Cover; cook until pasta is tender, 10 min. Remove from heat, stir parsley.