Mayo is very easy to make and requires no kitchen appliances. All you need is an egg yolk or two, vinegar or lemon juice, salt, pepper, garlic, oil, the sweetener of your choice, a measuring cup, a mug or other cup, and a fork.
So, first, the egg. Mayo uses raw eggs, which makes many people nervous. However, it is important to be aware that chickens do not naturally carry salmonella. The eggs are only infected if the chicken is infected. While it seems counter-intuitive, antibiotic-free eggs are your best bet. In order to sell the eggs as antibiotic-free, the hens must be kept healthy. Otherwise, they will require antibiotics and will not be able to be sold as antibiotic-free. So these eggs are likely from healthy hens. If you go certified organic, the eggs will be quite safe. For more information, look here or here. You should cook the eggs if you are high-risk though, or if you are on stomach acid-reducing medication. (We had to do lots of testing when the Bean ate a raw Save-a-Lot egg when she was on Prevacid and Axid!).
So you have the egg. Now you need to choose an oil. I try to avoid standard vegetable or canola oil, since both are rich in Omega 6’s. Omega 6’s are not bad, but it is best to eat more Omega 3’s than 6’s. When people eat more 6’s than 3’s, there are problems. (And this is a huge problem with the typical American diet). More info here. Walnut and hazelnut oil are very good for this. Olive oil has a lot of monounsaturated fats, which are also very healthy, but I don’t think that mayo from olive oil tastes as good.
Now it’s time to begin. Put the egg yolk in the mug. Add a tablespoon of vinegar or lemon juice, and seasoning to taste. Sometimes I add a tablespoon or two of Stevia, and it’s really good with the unprocessed, green Stevia leaves if you don’t mind the color. Honey would also be very good. Stir up the egg with the fork. Measure out 3/4 cup of oil in the measuring cup. Very slowly pour it in, stirring with the fork as you go. This takes awhile, but it should thicken up nicely. If it does separate, just add another egg yolk and keep going.
Now, enjoy a sandwich or a chicken or egg salad!