Step 1

1 Heat oven to 450°F. Spray 13x9-inch (3-quart) glass baking dish with cooking spray.

Step 2

2 In 12-inch skillet, heat 1 tablespoon butter over medium-high heat. Add onions, carrots and celery; cook 6 to 8 minutes, stirring frequently, until vegetables are tender. Add pot roast; cook and stir until hot.

Step 3

3 In large bowl, mix boiling water and remaining 1/4 cup butter; stir until butter is melted. Stir in milk, 2 pouches Potatoes and 2 pouches Sauce Mix. Stir in pot roast mixture. Pour into baking dish.

Step 4

4 Bake 35 to 40 minutes or until potatoes are tender. Let stand 5 minutes before serving (sauce will thicken as it stands).