60ml(¼cup)neutral oilsuch as sunflower, canola or avocado
20g(¼cup)parmesan cheesefinely grated
Instructions
In a small mixing bowl, whisk the egg yolks, Worcestershire sauce, lemon juice, garlic and mustard until well combined.
Combine both oils together in a large liquid measuring cup. Whisking constantly, slowly incorporate the oil into the egg yolk mixture - going drop by drop at the beginning to ensure a stable emulsion. You can increase the speed in which you add the oil once about half of if it is completely incorporated.
Once the oil is incorporated, grate in the parmesan cheese and add a number of grinds of black pepper. Whisk to combine and taste to adjust for seasoning.