DIRECTIONS
Preheat oven to 350°. In a large pot of salted boiling water, cook spaghetti

According to package directions until al dente, about 7 minutes

In a large skillet over medium heat, heat oil. Add onion and bell pepper and cook until soft, 5 minutes. Transfer to a plate.
Add chicken go skillet and season with salt, pepper, and chilli powder. Cook until chicken is golden, about 5 minutes. Transfer to a plate.
Melt butter in skillet over medium heat. Whisk in flour and cook 1 minute. Add milk and broth and cook until thick, about 3 minutes