Wendell's Mac and Cheese

Wendell found this recipe at Food.com.   I copied and pasted it below.  He made a double recipe and also made a few changes (noted in red between asterisks). 




Ingredients:
1 (8 ounce) package macaroni
4 tablespoons butter
4 tablespoons flour
1 cup milk
1 cup cream
*for his double recipe Wendell used 3 cups milk and 1 cup whipping cream*
1/2 teaspoon salt
fresh ground black pepper, to taste
2 cups cheddar cheese, shredded good quality
1/2 cup breadcrumbs, buttered
*1/2 onion, chopped*
*1 can tuna, drained*
*cheddar cheese to top*

Directions:
1  Preheat oven to 400°F.
2  Cook and drain macaroni according to package directions; set aside.
3  In a large saucepan melt butter. *saute chopped onions in the butter*
4  Add flour mixed with salt and pepper, using a whisk to stir until well blended.
5  Pour milk and cream in gradually; stirring constantly.
6  Bring to boiling point and boil 2 minutes (stirring constantly).
7  Reduce heat and cook (stirring constantly) 10 minutes.
8  Add shredded cheddar little by little and simmer an additional 5 minutes, or until cheese melts.
9  Turn off flame.
10  Add macaroni to the saucepan and toss to coat with the cheese sauce. *add tuna*
11  Transfer macaroni to a buttered baking dish.
12  *Sprinkle top with shredded cheddar cheese.*  Sprinkle with breadcrumbs. 
13  Bake 20 minutes until the top is golden brown.

Here's my plate.  It was supa, supa good.