Preheat oven to 350 degrees F.
Stir soup, milk, soy sauce, black pepper, beans, and 1 1/2 cups of the onions in a 3-qt. casserole.
Bake, uncovered, 25 minutes or until bean mixture is hot and bubbling. Stir bean mixture. Sprinkle with remaining onions.
Bake 5 minutes or until onions are golden. For a lighter version, use Del Monte® Cut Green Beans-No Salt Added, Campbell's® 98% Fat Free or Healthy Request soup, fat-free milk and lite soy sauce.