Combine the dressing base

Combine the egg yolk, apple cider vinegar, sherry, Worcestershire, sugar, seasoned salt, paprika, garlic powder, and Dijon mustard. Whisk until completely combined.

1 large egg yolk3 tbsp apple cider vinegar1 tbsp dry sherry1 tsp Worcestershire sauce1 tsp sugar3/4 tsp seasoned salt1/2 tsp sweet paprika1/4 tsp garlic powder1 tsp Dijon mustard