1. Firsty, make the sauce for the dish, to do this, melt the butter in a saucepan and add the flour. Stir together for 2 minutes.
2. Gradually add the milk, bringing the sauce to a smooth consistency with each addition.
3. When all the milk is added, simmer the sauce for 2 minutes
4. Add the ham and cheese to the sauce and stir until the sauce is smooth
5. Put the cooked pasta into a mixing bowl and pour in the sauce
6. Combine well and transfer to an ovenproof dish.
7. Bake at 175 degrees until bubbling and golden brown
