01 -
Preheat oven to 350°F (175°C). Lightly grease a large casserole dish.
02 -
In a large pot over medium heat, cook chicken breasts for 6 to 7 minutes on each side until golden brown and fully cooked through.
03 -
Boil salted water in a separate pot. Cook spaghetti until al dente, approximately 8 to 10 minutes. Drain and set aside.
04 -
In a mixing bowl, combine shredded chicken, cooked spaghetti, cream of chicken soup, chopped bell peppers, paprika, cayenne pepper, garlic powder, and half of the shredded cheddar cheese. Mix thoroughly until evenly incorporated.
05 -
Transfer mixture to the greased casserole dish. Sprinkle remaining cheddar cheese evenly on top. Bake for 25 to 30 minutes, until the casserole is bubbly and the cheese is golden brown.
06 -
Allow casserole to rest for 5 minutes after baking. Garnish with sliced green onions before serving.