Soak lima beans in cold water overnight. Drain the lima beans and rinse in several changes of water to float away as many loosened shells as possible. Place in crockpot with 8 cups fresh water, the chopped onion, carrot, garlic and bouillon cube. Cover tightly and cook 18-24 hours, until beans are very tender. Remove from heat and let cool a little.
In the meantime, heat the oil in a skillet and saute the finely diced onion until it is very brown. Ladle a small amount of soup at a time into blender or bowl of a food processor and puree until all soup is pureed. Return to pot and stir in browned onions. Taste for seasoning and add salt and pepper to taste. Makes 8 to 10 servings. Freezes well
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