I was looking for some new recipes and I found this one this site. It turned out really well.
2 (14.5 oz) cans of Italian-style diced tomatoes
1 (19oz) can cannellini beans, drained and rinsed
10oz fresh spinach, washed and chopped
8oz penne pasta
1/2 cup crumbled feta cheese
1. Cook the pasta in a large pot of boiling salted water until al dente.
2. Meanwhile, combine tomatoes and beans in a large, non-stick skillet. Bring to a boil over medium high heat. Reduce heat, and simmer 10 minutes.
3. Add spinach to the sauce; cook for 2 minutes, or until spinach wilts, stirring constantly.
4. serve sauce over pasta, and sprinkle with feta.