Mac and Cheese

1 pkg. elbow macaroni
1/4 c oleo
6 T flour
1 t salt
2 cups milk
2 cups grated cheddar cheese

Cook macaroni as directed. Melt oleo, stir in flour, sald and milk. Microwave on high 5 1/2 - 6 minutes, stirring every minute. Stir in cheese until completely melted. Mix sauce and mac together. Put into oven safe dish. Bake at 250 for 45 minutes.