- 2 tablespoons butter or margarine
- 3 large onions, peeled, sliced and separated into rings
- 2 (10.5 ounce) cans condensed beef broth
- 1 tablespoon A.1. Original Steak Sauce
- 1 cup seasoned croutons
- 1 cup KRAFT Shredded Low-Moisture Part-Skim Mozzarella Cheese or KRAFT Shredded Swiss Cheese
- Melt butter in large saucepan on medium heat. Add onions; cook 10 min. or until golden brown, stirring frequently.
- Add broth, 2 soup cans water and steak sauce. Bring to boil. Reduce heat to medium-low; simmer 5 min.
- Preheat broiler. Ladle soup evenly into 4 large ovenproof bowls. Top with croutons and cheese. Broil 2 to 3 min. or until cheese is melted.