Turkey Imperial

I'm making this recipe an official "My Recipe Box" tradition for the week after Thanksgiving. Here are my lead-ins for the past two years:

"If this sounds familiar, it is. I used this recipe last year about this time. It's worth repeating." (November 2017)

"I used to make this after Thanksgiving when I had a family and trying to stretch all the leftovers I could. It's very good and would be handy if there is still "leftover" company." (November 2016)

INGREDIENTS:

1 pkg 8 oz thin spaghetti 4 TBSP flour (1/4c)

½ c. butter ½ tsp salt

4 c. cooked turkey (or chicken) ¼ tsp pepp...