Heat oven to 350°F. Spray 13x9-inch (3-quart) glass baking dish with cooking spray. In 3-quart saucepan, heat milk, water and margarine to boiling. Stir in contents of both pouches of potatoes (from potatoes box) just until moistened; let stand 1 minute. Stir with fork until smooth. Stir in corn.
|