Remoulade is a French sauce that loosely resembles Thousand Island dressing. In the United States, it's often served with Southern classics like crab cakes, fried green tomatoes, Po'boys, and other fried favorites.
In a medium bowl, whisk together mayonnaise, ketchup, lemon juice, mustard, anchovy paste, garlic powder, onion powder, and cayenne pepper. Add salt, pepper, tabasco, and Worcestershire sauce to taste.
Fold in parsley. Cover and chill until serving time, up to four days in the refrigerator in an airtight container.
Notes
Tabasco: For a spicer sauce, add extra tabasco and cayenne pepper.
Worcestershire: You get plenty of umami oomph from the anchovy paste, so taste the sauce before adding more Worcestershire.