To make any of the 4 options, shake the ingredients together in a lidded jar to emulsify, adding 1 tablespoon of water to each. Alternatively, whisk everything together in a bowl with 1 tablespoon of water, adding the oil in a thin stream while whisking, and season to taste. The splash of water adds lightness. In the case of the herb dressing, use a hand blender to blend the ingredients until smooth, if you like. You can then use this as a dip for crudités as well as a dressing.