Cauliflower Potato Salad

Bahan-bahan (6 porsi)

• 1 large head cauliflower, (cored and cut into small florets)
• 1 cup finely chopped celery
• ⅓ cup finely chopped red onion
• ½ cup mayonnaise ((regular or light))
• 1 tablespoon yellow mustard
• 1½ teaspoons apple cider vinegar
• ½ teaspoon fine sea salt
• ¼ teaspoon freshly ground black pepper
• ¼ teaspoon garlic powder
• sliced green onion, (for garnish (optional))