Cheesy Chicken Penne

I found a new recipe tweaked it a little and the outcome was an awesome meal if I do say so myself!
6 tbsp.. butter
1 tsp. olive oil
1/2  cup + 2 tbsp.. flour
6 cloves garlic minced
6 cups milk
1 lb. penne pasta
8 oz.  mushrooms
1 cup sun dried tomatoes packed in oil
2 cups shredded Italian cheese blend
1 1/2 cups shredded parmesan cheese
4 boneless skinless chicken thighs cubed
salt & Pepper
1. preheat oven to 400. Spray deep baking dish. Cook pasta just short of aldente, drain and set aside.
2. While pasta is boiling heat oil in skillet season chicken cook until done, set chicken aside. Toss mushrooms into skillet and sauté.
3. In heavy pan melt butter over medium heat. Add flour and garlic; cook until garlic starts to brown, stirring frequently.
when garlic starts browning gradually add milk bring to a simmer. Keep stirring as sauce starts to thicken.
add mushrooms and tomatoes cook for about a minute. remove pan from heat and gradually stir in Italian cheese and parmesan cheese.
4. add chicken and cooked pasta to baking pan season with salt and pepper to taste. Pour mixture to top of chicken and pasta.
5. Bake uncovered until golden and bubbling about 25 minutes.
serve with garlic bread or breadsticks.