Mayonnaise

• 1 egg yolk
• pinch dry mustard
• salt
• freshly milled pepper

Place the egg yolk in a deep mixing basin. Add the mustard, seasonings and a little of the vinegar or lemon juice. Place the basin on a damp cloth or sponge square; this helps to steady the basin while mixing. Have the oil measured into a jug for easy pouring.

Whisk the ingredients to blend, then add the oil very slowly drop by drop, whisking all the time until the mayonnaise begins to