In the slow cooker, add the chicken broth, chicken breast, roasted red peppers, parsley, garlic, salt, oregano, basil and pepper. Cover and cook on high for 3 hours or low for 6 hours until chicken is cooked through
Remove chicken from the slow cooker and shred. Add it back into the slow cooker.
In a bowl, whisk the cream or milk and cornstarch together. Add to the slow cooker with the pasta (or cook the pasta seperately in boiling water to prevent it from breaking down in the soup) and spinach. Stir to combine
Turn to high and cook for 15-20 minutes until pasta is al dente or cooked to desired tenderness (this can take up to 30 minutes). Turn off, add in cheese (and pasta if cooking seperately) and stir to combine. Serves 6.