How about a Bearnaise sauce?
Link doesn't work - here's the recipe:
GRILLED CRAB WITH BLENDER BEARNAISE SAUCE
1/4 cup white wine vinegar
1-1/2 tsp. minced onions or chives
1 tsp. tarragon leaves, crushed
3 egg yolks
1 tsp. Dijon-style mustard
1/4 tsp. salt
1/4 tsp. pepper
1-1/2 sticks (3/4 cup) butter
1/4 cup chopped ripe olives
2 lbs. Alaska king, dungeness or snow crab legs
In small, microwaveable bowl, combine vinegar, onion and tarragon. Microwave on high about 2 minutes or until vinegar is reduced to 2 tbsp.; set aside. Place egg yoks, mustard, salt and pepper in blender; blend on low 3 seconds. Put butter in microwaveable cup, cover, and microwave on high until melted, about 2 minutes. With blender on low, gradually pour hot butter into yolks in a steady stream; turn off blender. Add vinegar mixture, olives and blend just until combined. Keep warm. Cook Alaska crab on hot grill about 5 minutes. Serve with Bernaise sauce.
Makes 4 servings.
Recipe by Alaska Fisherman Steve Williams
King Salmon, Alaska