Aquafaba mayo is easy to make and a delicious way to use up a byproduct that would otherwise be wasted. The quality of the oil is important, because it will be the main flavour of the mayonnaise.
50ml bean water
1 tbsp mustard
Salt and black pepper
About 200ml olive oil
1 tbsp vinegar – cider, white-wine or other
Put the aquafaba, mustard and a pinch of salt and pepper in a clean, grease-free bowl. Blend with a hand-mixer (or put everything in a blender) until combined and frothy, then pour in the oil in a very slow, steady stream, blending as you go. Once the consistency is as you like, stop adding the oil and blend in the vinegar and garlic, if using.