Step 1

Fry the onion and garlic in butter. Add flour, stir, cook for no more than 1 minute.

Step 2

Add milk and sour cream, whisk and cook until thick. Then add the cheese and stir again.

Step 3

Add chicken, pasta, salt, red pepper flakes. Toss and place in a prepared baking dish (9 * 13 inches). Bake in preheated to 350 F oven for 20-30 minutes or until cheese starts bubbling.