Russian dressing  (from Epicurious)
Yield: Makes about 1¼ cups

Ingredients:
  * 1 tablespoon finely chopped onion
  * 1 cup purchased or homemade mayonnaise
  * ¼ cup ketchup-style chili sauce or ketchup
  * 4 teaspoons bottled (regular; not packed in beet juice) horseradish, or to taste
  * 1 teaspoon hot sauce, preferably Frank's Red Hot Sauce
  * 1 teaspoon Worcestershire sauce
  * ¼ teaspoon sweet paprika
  * Fine sea salt

Preparation:
  - In a mortar and pestle, mash the onion to create a paste, or use a large heavy knife to mince and mash the onion into a paste. 
  - Transfer the onion paste to a small bowl and whisk in the mayonnaise, chili sauce, horseradish, hot sauce, Worcestershire sauce, and sweet paprika. 
  - Season with fine sea salt, if desired. DO AHEAD: The dressing can be prepared ahead and refrigerated, in an airtight container, up to 2 weeks.

Russian dressing and Thousand Island dressing are often confused because both begin with a base of mayonnaise and ketchup or ketchup-style chili sauce, which results in a pink salad dressing. But where Thousand Island is a bit sweet and studded with pickle relish, Russian dressing is on the spicier side, with a hint of heat from horseradish and hot sauce.