Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   1      thick slice   French bread
                        milk
   4      cloves        garlic
   2                    egg yolks /
     1/8  teaspoon      salt
   1      cup           olive oil
   1      tablespoon    boiling water
                        lemon juice

Preparation:

I find a recipe in my Encyclopedia of Cooking by JoAnna Morris for aioli. Here it is: Remove the crusts from bread and soak in milk. Squeeze dry. Place in large mortar with garlic and mash with pestle until a fine paste. Add the yolks and salt and mash in. Drop by drop pound in olive oil. When the sauce becomes thick; the remaining oil may be beaten in. Thin with water and lemon juice to taste.