For an extra layer of flavor, try roasting the cherry tomatoes before adding them to the skillet. Toss them with olive oil, salt, and pepper, and roast at 400°F (200°C) for about 15-20 minutes. If you don't have a food processor, you can mash the cannellini beans with a fork, although the sauce will be less smooth. Fresh basil or parsley would make a lovely addition as a garnish.