English Cottage Pie

Name: English Cottage Pie
Cook time: 30 min
Total time: 50 min
Yield: 6
Ingredients: 900 gram floury potatoes; salt and pepper; 2 large onions; 28 gram beef drippings; 900 gram minced beef; 3 teaspoons flour; A bowl with a capacity of 1/4 liter containing strong beef stock; 1 ( 397 gram ) can chopped tomatoes; 227 gram frozen vegetables ( green beans are nice ); A cup with a capacity of 130 ml containing milk; 57 gram butter