Pasta with onion and white kidney beans in a tomato sauce

1 28oz can crushed tomatoes
1 15 oz white kidney beans, rinsed (sometimes called cannellini beans)
2T olive oil
2T apple juice
1/4t dried oregano
1/4t red pepper flakes
1 small onion
12oz Farfalle (bow tie) or other mid-sized pasta

heat water for pasta. mix all ingredients except pasta and onion in a saucepan and bring to a boil, stirring occasionally, reduce to a low boil. Cook pasta and drain. coarsely dice onion and add to sauce for last 2 minutes. Mix sauce and pasta, serve. About 20 minutes. Add more red pepper flakes for a spicier sauce.