2 1/2 lbs - Boiling potatoes
1 large - Onion
1/4 lb - Sharp Cheddar cheese
4 Tbls - Flour
6-8 Tbls - Butter
3-4 cups - Milk
Salt and freshly ground pepper
Peel and slice the potatoes into 1/8-inch pieces; drop into cold water. Peel and thinly slice the onion. Roughly grate the cheese.Butter a deep 2 1/2-3 quart casserole dish. Dry the potatoes. Divide the ingredients into fourths and in the following order:
Layer the potatoes and season with salt and pepper. Add the onion slices, sprinkle with flour and dot with butter.
Top with cheese. Repeat this layering three times.
Pour over just enough milk to cover the potatoes. Cover the dish and place in a preheated 350 oven. Bake for 45-60 minutes or until the milk comes to the boil and bubbles. Remove the cover and bake for another 30-45 min. or until the potatoes are tender and the top is browned.