Hawaiian BBQ Macaroni Salad (Creamy Plate-Lunch Side)

Ingredients

• 1 lb (450 g) elbow macaroni
• 1 tablespoon kosher salt, for the pasta water
• 1/4 cup (60 ml) apple cider vinegar
• 1 1/2 cups (360 g) full-fat mayonnaise
• 1/2 cup (120 ml) whole milk, plus more as needed
• 1 tablespoon granulated sugar
• 1 teaspoon fine salt, plus more to taste
• 1/2 teaspoon black pepper
• 1/4 cup (35 g) finely grated yellow onion
• 1 large carrot, peeled and grated
• 1 celery rib, finely diced
• 2 green onions, thinly sliced