I have been looking for a healthy "Mayo" recipe for a while now, and finally decided to try one, that I had found. It was a dismal failure. I think adding the mustard and lemon juice, at the beginning, may have caused the egg to curdle, and it never thickened. So, I tried mixing the egg and slowly drizzled oil mixture, first, and then the lemon, salt and mustard. Voila! Success! I used Brown Mustard with Horseradish, because that is what I had in the house. But, I think you could use Dijon or even yellow mustard, with excellent results. I mixed Olive Oil and Safflower Oil, because I had seen that Olive Oil, by it's self, it really strong. But, you can use any oil or combination of oils. I hope my recipe is what you are looking for, and that you enjoy it, as much as my hubby and I do.