This recipe makes about ¾ cup of dressing.
I think it's easiest to emulsify a dressing by shaking it vigorously in a jar but you can achieve smooth results by whisking the ingredients in a bowl or blending them together in a blender as well.
If your salad dressing happens to separate, simply give it a good shake before serving.
Important Note about Salt: Not all salts are made equal and cannot be substituted 1:1. If you are substituting table salt for kosher salt, you will need to cut the amount called for in the recipe by at least half.