The recipe I used for my mayo is:
2 Egg Whites
1 Table Spoon of Lemon Juice
1 Teaspoon of yellow mustard
3/4 Cup of Vegetable Oil
Salt and Pepper to taste.
Mix all the ingredients but the oil in the blender on low.
Slowly with a small steady stream add the oil to the mixture, still mixing with the lowest setting.
Adding the oil can result in slight spattering.
*you can use 1 whole egg in place of the the 2 egg whites but it makes the mayo a yellower color*