Please read this important message from General Mills regarding their recent flour recall: http://www.generalmills.com/flour
Add the mix-ins of your choosing to the base mac and cheese recipe. Try all three!
Cook macaroni 1 minute shy of al dente in boiling, salted water. Drain and reserve.
For the Bechamel Cheese Sauce, melt butter and whisk in flour to make a dark blonde roux the consistency of wet sand. Whisk in the milk to combine thoroughly. Add the salt and nutmeg, and cook for 15 minutes—make sure to scrape the bottom of the pot periodically so the sauce does not burn. Add the cheese in handfuls, stir to melt and remove pan from heat.