Macaroni and Cheese

My grandma bought me "The Basics and More" cookbook for my bridal shower a few years ago.  I have gotten many great recipes from it, but the best is probably the macaroni and cheese - although I changed it a little bit!  Here are the ingredients:

1lb macaroni
1 stick butter
1/2c flour
salt & pepper
1qt milk (whole milk really makes it richer, but skim is also good!)
1 1/2lbs Velveeta

Boil the macaroni according to the package directions.  Melt the butter then add the flour to make a roux.  I add the salt and pepper here.  Cook the flour for just a minute then add the milk.  I usually add about 1 c of the milk and wisk it with the flour.  If you add it all at once, it's hard to get the roux to mix in without being lumpy.  Heat the sauce until it's almost boiling - you dont' want it to actually boil, though.  When there are bubbles forming on the outside, it's probably hot enough.  Add the Velveeta and stir until it melts.  Mix in the macaroni and bake at 325 for 45 minutes.  You can also put this in the crockpot and just put on low.  For lunch sometimes, I mix in peas, carrots, and corn.