Cook potato with jacket on it in boiling water until almost but not quite tender; drain. Peel and shred while warm. Combine with 1 cup cheese, melted butter, 3/4 teaspoon salt and 1/8 teaspoon pepper, mixing well. Press into bottom and up sides of well-greased 9-inch pie pan. While potato is cooking, cook carrots until tender. Drain and cool. Place broccoli in small amount of boiling water and cook only 1 minute. Drain and cool. In large fry pan, cook ground beef, onion and garlic until meat is no longer pink. Drain off drippings. Stir in Worcestershire sauce, 1/2 teaspoon salt and 1/8 teaspoon pepper into meat mixture. Spoon meat mixture into prepared potato crust. Top with carrot slices, broccoli and chopped tomato. Bake in 350° oven about 30 minutes. Sprinkle remaining cheese over top of pie and return to oven 5 minutes.