Cook pasta according to package instructions.

In a pan, melt the butter. Saute the white onion for a few minutes.

Add the ham and cook.

Add the mushrooms and stir well.

Pour in the evaporated milk. Mix well.

Add the all-purpose cream, sugar, pepper and salt.

Add the cheese and mix until fully melted.

Add the pasta and coat evenly. Transfer to serving plate and top with additional cheese.