In a large saucepan, combine the first eight ingredients and add enough water just to cover. Bring to a boil. Cook, uncovered, over medium heat for 15-20 minutes or until tender.
Meanwhile, in a microwave-safe bowl, microwave butter until melted. Stir in cornstarch, salt and pepper until smooth. Gradually add milk and evaporated milk. Microwave, uncovered, on high for 8-10 minutes or until thickened and bubbly, stirring every 2 minutes. Stir into vegetable mixture. Yield: 5 servings.