Macaroni & Cheese

1 ½ C. medium elbow macaroni
2 T. butter
2 T. flour
1 ½ C. (or more) grated cheddar cheese
A little chopped onion
2 C. milk
Salt & pepper

Boil macaroni until fairly tender; drain. While macaroni is boiling make sauce. Melt butter & stir in flour until smooth. Add milk & heat to make a sort of gravy. Add cheese & onion. Add cooked macaroni. If you want to add more cheese, slice it & add to the top.