Ryans Shepherds Pie

Name: Ryan's Shepherd's Pie
Ingredients: 3 large baking potatoes (about 2 pounds), peeled & thinly sliced; salt and pepper; 1 T vegetable oil; 6 celery stalks, sliced thin; 6 carrots, sliced thin; 1 large onion, chopped; 2 T fresh or dried shallots, chopped; 1/4 C tomato paste; 1/4 C flour; 2 lbs. ground beef; 1 C corn; 1 cup milk; 2 C cheddar, shredded