Step 1

Mix the dressing: In a large mixing bowl, combine the mayonnaise, ketchup, cider vinegar, onion, relish, salt, and chili powder or pepper and mix until well-combined.

Step 2

Add the egg: Press the egg through a fine-mesh sieve into the bowl and mix well.

Step 3

Customize the dressing: If you wish, add any combination of optional ingredients (pimientos, chives, and/or hot sauce) and mix well.

Step 4

Serve: This dressing can be served immediately, but tastes even better if refrigerated in a covered container for 12 to 24 hours. It will keep for about 4 days.