Finding a mayonnaise in the grocery store with tolerable ingredients for FMers is nigh impossible. You can bet there is going to be garlic or onion powder in there somewhere. So, why not make your own? It’s easy, but it takes a while. It’s slow going because the liquids need to emulsify, so you are essentially suspending each drop of olive oil in with the egg yolk. If you add the oil too quickly then your liquids are going to separate.