1 large egg yolk
1 tablespoon plus 1 teaspoon sherry vinegar
1 teaspoon kosher salt
2 teaspoons Worcestershire sauce, preferably Lea and Perrins
1/8 teaspoon freshly ground black pepper
1 cup canola oil
1/4 cup extra-virgin olive oil
If the consistency is too thick, add a splash of water to loosen the texture.