Spinach Dip (from scratch or with seasoning mix)

Name: Spinach Dip (from scratch or with seasoning mix)
Prep time: 15 min
Total time: 15 min
Ingredients: 1 pkg. (12 oz.) frozen spinach, thawed and liquid squeezed out; ¼ cup finely shredded carrots; 1 ¼ cups 2% plain Greek yogurt or sour cream; ¾ cup mayonnaise; 1 can (8 oz.) sliced water chestnuts, drained and chopped; 2 green onions, finely chopped ((both green and white parts)); 1 tablespoon dry onion flakes ((see notes)); 1 teaspoon salt; 1 teaspoon dried parsley; ½ teaspoon dried thyme; ¼ teaspoon celery seed; ¼ teaspoon ground black pepper; ¼ teaspoon garlic powder