1egg yolk should be completely free of any white of the egg. place in deep bowl, add all dry ingredients stir with even rhythem with a whisk.and drop the oil in drop by drop stiring constantly. after a few mins, as it thickens, ateasp of oil will do at a time.. if it becomes too thick to take the oil add a little lemon juice.
2it should be completely blended in 5 or 6 mins a tablespoon of cream at the end will cut the oilyness.and make it smoother and richer. a teaspoon of hot water at the end will make it creamier, whiter and more subtle in flavor.