Combine everything except the avocado oil in a bowl. Whisk until the egg is light yellow and creamy looking. While continually whisking, slowly drizzle in 1/4 cup of avocado oil. Whisk for one minute longer. Slowly drizzle another 1/4 cup avocado oil while continually whisking. Whisk for another minute. Slowly add the remaining avocado oil while whisking continually. Whisk one last minute and presto! It’s amazing mayonnaise! It can be made in a food processor but whisking by hand is a great arm workout!