Place all ingredients in a small heavy-bottomed saucepan.
Whisk mixture until no lumps remain.
Place saucepan over medium heat.
Bring mixture to boil, whisking continuously to prevent lumps or sticking to bottom of pan.
Continue whisking until the sauce begins to thicken, usually a few minutes after sauce has reached the boil.
Turn down heat and continue whisking a further minute or so.
Taste test and adjust salt and pepper to your liking.
Serve drizzled over baked vegetables or combine into a potato, pasta, cauliflower or broccoli bake.