adapted by http://theresalwaysthyme.blogspot.com/
1/2 cup mayonnaise
1/3 cup ketchup (more or less to taste)
2 teaspoons pickle relish (optional)
fresh ground pepper, to taste
salt, to taste
Whisk mayonnaise and ketchup until smooth. Stir in salt and pepper, and pickle relish, if using. Refrigerate until you're ready to use.
Notes: You can also use chili sauce instead of ketchup, horseradish, capers, onions, a little bit of vinegar, or even hot sauce in the dressing, too.We like it simple. Just the mayo and ketchup, salt and pepper.