Makes 4 appetizer servings or 4 sandwiches
In a medium bowl, combine the crab, onion, scallions, tarragon, mint and lemon zest.
In a small bowl stir together the mayonnaise and mustard. Add the mayo-mustard mixture to the crab and toss until the dressing evenly coats the salad.
Season with the salt and pepper.
Cover with plastic wrap and refrigerate until ready to serve.