Cheese and Potato bake

From the Walberton Quick and Easy Cookbook

2lbs potatoes
6oz grated Cheddar cheese
1 egg
knob of butter and a little milk
small onion diced
1 large tomato sliced
6 rashers streaky bacon

Peel and boil potatoes. Fry the onion until soft. Grill the bacon and then cut into pieces. When potatoes have boiled, drain them and mash adding the knob of butter and a little milk. Add the egg, 40z cheese, onion and stir well. Turn mixture into casserole, arrange the bacon pieces and slices of tomato on top and sprinkle with remaining cheese. Bake in oven for 30-40 mins at 200C or Gas Mk 6. Serve with peas or other favourite vegetable.