Spray inside of crock pot with cooking spray. In small bowl, mix soup and roasted red pepper.
Place chicken in crock pot and layer with soup mixture, finishing with soup mixture. Dot butter on top of chicken and add ground black pepper as desired.
Cook on high 2+ hours or low for 4 hours, until chicken is cooked through and the internal temperature reads at least 160 degrees F on an instant read thermometer.
If sauce is thinner than desired, mix corn starch with one tablespoon of cold water and add to crock pot. Allow to continue cooking for 20 - 30 minutes.
Serve immediately on pasta. Sprinkle with Parmesan cheese.