In 6-quart kettle or stockpot, place vegetables, onions, garlic and cover with seafood stock. Over medium heat, simmer, covered, until vegetables are tender, about 10 minutes.
Meanwhile, prepare roux. In skillet over low heat, melt butter. Gradually stir in flour until it becomes smooth paste.
Cook, stirring constantly, until roux is light brown or almond color, about 5 or 6 minutes. Add cream or milk to soup and bring soup to boil, then gradually add roux and whip constantly to work out lumps until roux melts and soup thickens.
Add crab meat and salt and pepper.
Note: When reheating, add a bit more milk or cream until soup is of desired consistency.
Servings: 8 (1-cup)