Start by seasoning your chicken with salt, pepper, onion powder, Italian seasoning, and red pepper flakes. Sear the chicken in a pan until golden brown, ensuring not to crowd the pan for even cooking. As soon as you sprinkle the seasonings, you’ll catch a nice aroma.
Once the chicken is golden brown, stir in the minced garlic until fragrant. Then pour in the marinara sauce and Alfredo sauce, mixing until well combined. Be careful not to burn the garlic; it should just be fragrant.
Transfer the chicken and sauce into the crockpot, packing everything in tightly. This will ensure even cooking and allow the flavors to mingle.
Cover the crockpot and cook for four to six hours. Stir halfway through, but do not lift the lid too often to keep the steam in. Notice the delightful aroma wafting through your kitchen as it cooks.
About 30 minutes before serving, add the pasta and mozzarella cheese to the crockpot. Stir well to incorporate everything. The pasta will soak up the flavor, so do not worry if it begins to soften too much.
Just before serving, sprinkle some Parmesan cheese and dried parsley on top. This will add a pop of color and flavor. Be cautious not to add too much cheese initially; you can always adjust based on preference.