Soften cream cheese. Beat with sour cream until very smooth. Add mayonnaise, worcestershire sauce, seasonings and blend well. Fold in crab meat (be careful with this if you're using lump - you don't want to break up the lumps!). Place in a 2-1/2 qt. casserole dish. Bake uncovered for 20 minutes at 350ºF. Remove from oven and stir. Sprinkle cheese on top and return to oven for another 10 minutes.
Serves 6. 4 carbs per serving.
Source: Atkins Diet Low Carb Recipes