How to Make the Perfect Hawaiian Plate Lunch Mac Salad

Grate 1/4 small yellow onion on the large holes of a box grater into a large bowl until you have 3 tablespoons. Add 1 cup mayonnaise, 2 tablespoons milk, 1 tablespoon plus 1 teaspoon tablespoon apple cider vinegar, 1 tablespoon plus 1 teaspoon tablespoon dill pickle brine, 1/2 teaspoon kosher salt, 1/4 teaspoon granulated garlic, and 1/4 teaspoon black pepper. Whisk to combine.