In a large skillet cook meat until browned. Drain. Return to pan and add vegetable, water, onion, tomato soup, Worcestershire sauce, thyme, pepper and salt. Cook covered, 5 to 10 minutes or until corn is tender. Transfer to 13x9 inch baking dish. Top with mashed potatoes.
Sprinkle with cheese the last 10 minutes of baking.
Bake at 375° for 20-25 minutes or until hot and bubbly.