Place the yolk in a deep, heavy mixing bowl that won't move across the counter (you need both hands for the next step).
Using a hand mixer, beat in mustard, vinegar, salt and pepper. Very slowly (remember very slowly) pour in the oil. Watch in amazement as the mixture turns to mayonnaise.
That's it. And you thought it was tricky!
- 1 egg yolk
- 1 teaspoon prepared mustard
- 1 teaspoon white wine vinegar
- pinch of salt
- pinch of pepper
- 1 cup oil (safflower, corn, olive, or other)
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