This is one of the recipes my friend Angie stocked our freezer with when our twins were born. It's yummy, and easy, so I got the recipe from her once the girls were old enough for me to think about cooking and such LOL.
For an 8x8 pan: (double for 9x13)
2 c macaroni, cooked (whole wheat works fine)
2 Tbsp butter
sm onion, chopped
2 Tbsp flour (whole wheat works fine)
salt & pepper
2 c milk
2 c cheese, plus extra for top
In saucepan, saute onion in butter. Add (on med-low) flour, salt, pepper, slowly add milk. Let thicke, add cheese (on low) and melt. Pour over macaroni. Mix and put into casserole dish. Top with shredded cheese. Bake uncovered 1/2 hr at 350.