Summertime Macaroni and Cheese

What says summer more than hotdogs?  I really was in the mood the some hotdogs today, but macaroni and cheese was already on the menu.  So, why not both?  I didn't see a reason why not!
Also, it's been really hot here in Philly, so this is for stovetop, but if it's cooler where you are, feel free to throw it in the oven!

Summertime Macaroni and Cheese

Summertime Macaroni and Cheese

Ingredients
1 pound hotdogs, sliced
1 onion, diced
2 Tbsp. butter
8 ounces shell macaroni
2 cups milk (I used skim)
3 Tbsp. flour
1/2 tsp. black pepper
1 Tbsp. ground mustard
2 cups sharp cheddar cheese
1 cup canned french fried onions, optional
1/2 cup fresh tomatoes, diced, optional

Preparation
If you plan to use the french fried onions, preheat broiler, if it's too hot, that's fine too.
In a large pot, cook pasta according to directions.  Drain.
Meanwhile, in a large skillet, saute butter and onions over medium heat.  After about one minute, add in hotdogs. Cook until onions are translucent.  Set aside.
Using the same skillet, combine milk, flour, pepper, and mustard, whisking constantly.  Cook for about four minutes, or until thick.  Remove from heat and whisk in cheese.
Combine cheese mixture, pasta, and hotdog mixture in large pot.  Mix well.
*If putting macaroni and cheese in the oven, transfer to casserole dish and top with french fried onions. Broil 3-4 minutes.
Top with fresh tomatoes if using.
Enjoy!

Recipe Adapted from Cooking Light