Add all the ingredients, apart from the oil, to a glass jar that’s only slightly wider than the immersion blender head (a wide-mouth mason jar works well) or to an immersion blending cup. Pour the oil on top and let it settle for 30 seconds.

With the blender head fully touching the bottom of the jar, start blending on high speed. Do not lift the blender until an emulsion forms at the base. Then slowly angle and lift the immersion blender, to blend the top of the mixture. Continue to blend until the mixture is thick and glossy, clinging to the blender without running.

Taste and adjust seasoning with more salt, sugar, or lemon juice if needed.