Creating Easy CrockPot Chicken Spaghetti is straightforward if you follow these steps:

1. Prepare Chicken: Place the boneless, skinless chicken breasts at the bottom of the CrockPot.
2. Add Ingredients: Pour the marinara sauce and cream of mushroom soup over the chicken. Then, add the chicken broth, diced onion, minced garlic, and Italian seasoning.
3. Mix It Up: If you’re using a bell pepper, add it now. Stir everything gently until well combined.
4. Cook: Cover and cook on low for 6-8 hours or on high for 3-4 hours.
5. Cook Spaghetti: About 30 minutes before serving, cook the spaghetti noodles according to package instructions until al dente.
6. Shred Chicken: Once the cooking time is up, remove the chicken from the CrockPot and shred it with two forks. Return the shredded chicken to the sauce.
7. Combine: Add the cooked spaghetti noodles into the CrockPot. Mix gently until the pasta is fully coated with the sauce and chicken.
8. Cheesy Finish: Sprinkle the shredded cheese on top and cover for an additional 5-10 minutes to allow the cheese to melt.
9. Garnish: Once the cheese is melted, finish with freshly chopped parsley for a touch of color.

Following these steps will lead you to a wonderfully comforting dish everyone will love!