Preheat oven to 375degrees F (190 degrees C).Lightly grease a 10 inch casserole dish.
Bring a large pot of lightly salted water to a boil.Add pasta and cook for 8 to 10 minutes or until al dente; drain.
Melt butter in a small saucepan over medium heat.Stir in the flour and cook until a roux forms.Stir in the milk, salt and pepper; cook, stirring constantly, until sauce is smooth and thick and coats the back of a spoon.Remove from heat and stir in cheese.
Combine cooked pasta and cheese sauce; transfer to prepared dish.
Bake in preheated oven for 15 minutes, or until heated through.
Source: Read Full Article