To a 16-ounce, wide-mouth glass jar, add the egg yolk, garlic, mustard, salt, pepper, herbs, lemon juice, and anchovy paste if using
Do not stir
Slowly pour the oil on top.With the immersion blender in the OFF mode, place at the bottom of the jar, holding it straight up and down
Turn the immersion blender on low, keeping the blade at the bottom of the jar until the aioli starts to come together, about 30 seconds
Once it gets thick, slowly raise the immersion blender up to the top of the oil line
Move the blade up and down a few more times until the remaining oil has been incorporated
Serve with pickled veggies, roasted veggies, deviled or hard boiled eggs and avocado slices alongside.Store leftovers, refrigerated in an airtight container for up to 4 days.