
Whisk together the egg yolk with Dijon mustard and lemon juice.
Slowly stream the olive oil into the mixture, whisking the entire time until it becomes nice and creamy.
Stir in garlic, cayenne (or ghost powder), and a bit of salt and pepper.
If you’d like to thin it out, add a teaspoon or more of water and whisk.
Refrigerate until ready to use.