Combine. Whisk all ingredients together in a small mixing bowl until combined. The tahini may seize up briefly, but it should smooth out quickly as you continue whisking. If the dressing is too thick for your liking, you're welcome to mix in an extra tablespoon or two of water.
Serve. Serve and enjoy! Leftover dressing can be refrigerated in a sealed container for up to 1 week.
Notes
Recipe edits: This recipe was edited from the original to remove the cayenne and slightly decrease the amount of cumin/smoked paprika.