Preheat the oven to 180°C.

Cook the macaroni in salted water. (look at the package for the right time. (approximately 7 minutes)
When the macaroni is ready, drain the macaroni and rinse it under cold water.

Melt the butter in a saucepan.
When the butter is melted, add the flour.
Cook and stir for about 30 seconds.
Remove from heat
Add the milk little by little when stirring.
Add salt, peper and nutmeg (subjective)

Put the saucepan back to the heat and stir for approximately 2 minutes or until thickened
Bring the sauce to a boil.

Remove from the heat and add the grated cheese. Stir until the cheese is melted in the sauce.
Add the hamcubes and stir.

Add the macaroni to a baking dish and pour the sauce over it.
Gently mix the macaroni with the sauce.
Sprinkle some cheese over the baking dish.

Put it in the over for 30 - 35 minutes.

Serve and enjoy your meal.