Add all the ingredients to your glass jar and let them sit for a few seconds, just long enough for the egg to settle comfortably at the bottom of the jar, underneath the oil.
Insert your immersion blender and push it all the way down until it makes contact with the bottom of the jar.
Push the power button and do not move the blender for a full 20 seconds. Almost instantly, you’ll see the magic take place right before your eyes: the oil will start to emulsify and turn into this lusciously creamy and thick concoction, slowly making its way all the way to the top of the jar.
After 20 seconds, the transformation should be pretty much complete, so start moving your blender around and up and down just to make sure that every last bit of oil gets well incorporated.
About the oil, it's VERY IMPORTANT THAT YOU USE LIGHT TASTING OLIVE OIL and NOT full flavor. The latter is way too strong and will impart an unpleasant bitter taste to your mayo! You could, however, sub avocado, macadamia, almond or walnut oil for some (or all) of the light tasting olive oil.Likewise, it is of utmost importance that you use the proper equipment, as described. And if for some reason, this mayonnaise didn't work for you, don't throw it out! Turn it into a lusciously Creamy Ranch Dressing instead!