Stove Top Macaroni and Cheese

I got this recipe from my Sister-in-Law, Jackie.  It was really tasty and quite easy.  It was a instant favorite even for picky eaters. Beware though, it makes a lot for two!  We had quite a bit of leftovers for lunch the next day or two.

Stove Top Macaroni and Cheese
From: Jackie (my sister-in-law)

Ingredients:
1 Tbsp Butter
2 Tbsp Flour
1 (14 oz) can diced tomatoes (optional)
1 1/2 cup shredded reduced fat mild or sharp cheddar cheese
1/2 cup milk
2 Tbsp grated Parmesan Cheese
1/2 tsp dry mustard
1/2 tsp salt
8oz of Elbow macaroni  (because I didn't read the directions very clearly I accidentally used too much pasta, but it still turned out great!)

Directions:
1. Prepare pasta according to directions

2. Melt the butter in a large nonstick skillet over medium-high heat.  Add flour and cook, stirring constantly until golden, about 1 minute.

3.  Stir in the cheddar cheese, milk, Parmesan cheese, mustard, and salt.  Cook, stirring constantly until the cheese melts and the mixture is smooth, about 2-3 minutes.

4. Stir the pasta into the skillet and cook until heated through and well coated 1-2 minutes.  Let stand 2 minutes before serving.