Gather all your ingredients. Chop the capers and place them in a medium-sized mixing bowl. Finely chop the parsley and add to the mixing bowl. Slice the scallion and place the mixing bowl.
Measure, Mix, and Finish
Measure and mix the rest of the ingredients and add them to the mixing bowl. Add kosher salt and pepper to taste. Cover and place in the refrigerator to allow the flavors to meld, or eat it right away! Store covered in the fridge for up to one week.