Cauliflower Potato Salad

Ingredients (10)

• 1 large head cauliflower,
• 1 cup finely chopped celery
• 1/3 cup finely chopped red onion
• 1/2 cup mayonnaise
• 1 tablespoon yellow mustard
• 1½ teaspoons apple cider vinegar
• 1/2 teaspoon fine sea salt
• 1/4 teaspoon freshly ground black pepper
• 1/4 teaspoon garlic powder
• sliced green onion,