Gather your ingredients and mayonnaise making paraphernalia
Place 1 Egg, 10g Dijon Mustard, and 3g Salt in a bowl wide enough to accommodate the hand mixer, and using the general whisk attachment, mix until fully combined
Once sufficiently incorporated, keep the mixer running with one hand, and add the oil in very small increments with the other. Each time you add oil, ensure it has been completely consumed by the mixture before adding any more
Keep slowly adding the oil, and once halfway through, you can begin pouring it a little more quickly, eventually ending up with a mixture that resembles cold, set custard
Next up, we’ll perform some minor magic. Keeping the mixer running, add 15g of White Vinegar, and watch the mixture turn white and creamy before your very eyes, resulting in a very legitimate mayonnaise
Finally, give the whole thing one last stir with a rubber spatula
Celebrate your creation with a sandwich, or, if you’re from Belgium, some fried potato