Brown the meat in a deep skillet; drain on paper towels. In same skillet, cook the onion and garlic till just tender. Return the meat to the skillet and add the mushrooms, carrots, and celery. Cook till vegetables begin to soften. Add flour, stir, and cook for one minute. Add beef broth and salt and pepper to taste. Bring to boil, reduce heat, and simmer, covered, for twenty minutes or until broth has boiled off. Meanwhile, boil potatoes and mash together with milk, sour cream, butter, and salt and pepper to taste; stir well. Spread the meat mixture in a 13x8x2 inch dish. Spread the mashed potatoes over this. Sprinkle grated cheddar over the mashed potatoes. Bake in a 350°F oven for 30 minutes or until golden and bubbly. |