Peel the eggs and roughly chop them. Thinly slice the dill pickles and scallions. Very finely chop the walnuts and the dill. Add all to a mixing bowl along with the mayonnaise, mustard, lemon juice, salt and pepper.
Step 2
Mix together well to combine.
Step 3
Cut the tough bases from the celery and discard. Divide the egg mayonnaise mixture between the four celery stalks to serve.