Baked Macoroni and Cheese

9X13 pan, sprayed

In pan put 3 cups macaroni uncooked
6 T flour
2 1/4 t salt
3 C water
3 C milk  Combine then cut up butterr
6 T. butter

Cover and Bake 350 45 minutes.  Then add  3 cups of cheese and stir.    To make a smaller batch, use 2 c. macoroni, 4 T flour 1 3/4 t. salt, 2 c water, 2 c, milk and 4 T butter and 2 c. cheese