In order to prepare a Cottage Pie, you will need the following ingredients: oil, potatoes, carrots, 2 large onions, 1 3/4 lbs minced beef, butter, condensed oxtail soup, 6 beef Oxo cubes, 1/2 lb. of cheese, and 1 lb of peas. Preheat oven to 350 degrees. Boil water. Peel and quarter the potatoes and place them in boiling water. Chop onions and carrots. Brown the minced meat in a pot with a little oil. Add onions. Cook until onions have softened. Add carrots, soup, peas, and cubes. When potatoes are tender, drain them. Mash them with a potato masher. Add butter. Pour the meat into a casserole dish. Top with potatoes. Place it in the oven. Bake until potatoes are brown. Grate cheese. Top with cheese. Return to oven to melt cheese. Serve.