In a large skillet cook onion and garlic in hot oil about 5 minutes or until tender. Add undrained tomatoes, olives, and oregano. Bring to boiling; reduce heat. Boil gently, uncovered, for 10 minutes. Add beans. Return to boiling. Boil gently, uncovered, about 8 minutes or until desired consistency and beans are tender.
Transfer to a serving bowl; sprinkle with cheese. If desired, serve with a slotted spoon. Makes 6 side-dish servings.