This recipe is from an old Betty Crocker cookbook.
6 hard cooked eggs 1/2 tsp salt 1/2 tsp dry mustard 1/4 tsp pepper 3 Tbsp mayo Cut peeled eggs lengthwise in half. Slip out yolks mash with fork. Mix in seasonings & mayo. Put in a baggie, snip the corner & squeeze into egg whites. Sprinkle with paprika.
