1Heat oven to 400°F. Spray 1 1/2-quart casserole with cooking spray. In casserole, stir sauce mix, water, milk, cream cheese and garlic powder with whisk until blended. Stir in potatoes.
2Bake uncovered 30 to 35 minutes or until potatoes are tender. Allow to stand 5 minutes to thicken. Stir; sprinkle with bacon and onions.