Bacon and Tomato Mac 'N' Cheese!

Ok, so I have been making my own macaroni for a long time but I get bored so I change it a little evry time. I made this version about a month ago and I really like it. To my surprise Pizza Hut must have a monopoly on my brainwaves because they now have a bacon macaroni. Whatever.

12 oz. Package of Noodles (I like rotini or giant macaroni noodles)

Cook the noodles first and just set them aside...

5-6 slices of bacon-cooked and crumbled (bacon bits could work)
1 1/2 cups cheese- Cubed or shredded (I always have colby jack so thats what I use. Sharp cheddar is what is normally used for macaroni but I dont know what that would do to the taste?)
Diced Tomatoes (as much or as litle as you like- I like to use the whole can)

Make sure everything up until this point is done before moving on to the next step because if you havent made a roux before, it might requires your full attention...

4 Tb. Butter
4 Tb. Flour
Milk (I never measure but it is probably about almost 2 cups, just add small amounts gradually until you have enough sauce to cover your noodles.)
Salt and Pepper to taste
1 tsp Garlic powder (optional- nutmeg is also an optional item. It gives the sauce more of warm, rich taste)
1 Tb. Spicy Mustard

In a large saucepan, melt the butter on med-low heat. Once melted, slowly whisk in the flour. The mixture is going to thicken and get lumpy. Just keep whisking and slowly add milk. Keep whisking. Slowly add more milk... the roux should begin to thicken and resemble a creamy sauce. Keep whisking. Add cheese. At this point you can just stir the sauce. Add salt, pepper, garlic, and nutmeg-if desired. Add bacon and tomatoes. Now you have a decision to make. If your pan is big enough you can add the noodles to your sauce and stir or you can pour the noodles and sauce into a 9x13 pan, sprinkle with more cheese and bake it for about 15 minutes. Your choice.