Separate onion rings. Place in crock pot. Add bouillon cubes and water. Cook on high for 3-4 hours or until onions are tender. May simmer on low all day. Preheat oven to broil. Ladle soup into mugs. Top with toast and cheese. Broil for 2-3 minutes or until cheese is melted and bubbly. 6-8 servings.
By Robin from Washington, IA
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