1.In A Medium Size Saucepan Heat The Olive Oil. Saute Onion Until Tender. Stir In Tomatoes And Entire Can Of Beans. Let Simmer For 10 Minutes. 2.Bring A Large Pot Of Lightly Salted Water To A Boil. Add Penne Pasta And Cook For 8 To 10 Minutes Or Until Al Dente; Drain. 3.Mix Pasta With Bean Mixture And Salt As Desired.