01 -
Preheat the oven to 350°F (175°C) and grease a large casserole dish.
02 -
Heat a large pot over medium heat and cook chicken breasts for 6-7 minutes per side until golden and cooked through.
03 -
Boil salted water and cook spaghetti until al dente, approximately 8-10 minutes. Drain and set aside.
04 -
In a bowl, mix shredded chicken, cooked spaghetti, cream of chicken soup, chopped bell peppers, spices, and half of the shredded cheddar cheese until evenly combined.
05 -
Transfer mixture to the prepared casserole dish and top evenly with the remaining cheddar cheese. Bake for 25-30 minutes until the surface is bubbly and golden brown.
06 -
Allow the dish to rest for 5 minutes, then garnish with sliced green onions before serving.