½cupgrated cheddaror other similar cheese you like
Instructions
In a large saucepan, melt the butter. Add the flour, salt and pepper and stir continuously. Add the milk and bring to a boil.
When the mixture is boiling, remove from heat, add in the cheddar and mix together. Then add the onion and the sliced potatoes in the pan let them sit in the pan for 5 mins.
Place the potatoes and cheese mix in an oven proof dish, layering the potatoes and topping them with the mix. Repeat untill you finish all the potatoes and the cheesy mixture, then top with grated cheese.
Place in the pre-heated oven at 180°C, cover the baking dish with tin foil for 30 minutes and bake. After 30 minutes, remove tin foil and bake for 20 more minutes or until the potatoes are cooked and the cheese has formed a crust.