1. In an 8-qt container, combine water and Crab Base, mixing well.
2. In a food processor, add onions, avocados, lime juice, Culinary Cream, sour cream, and crab stock. Purée until smooth.
3. Add Maggi Seasoning. Blend well. Season to taste.
4. Garnish each serving with crab, tomatoes, and chopped parsley. Serve chilled.