To a large slow cooker add in the chicken breast, minced garlic, crushed tomatoes, tomato sauce, salt, pepper, Italian seasoning and chicken broth to the slow cooker.
Cover and cook on low for 6-7 hours or high for 4-5 hours or until the chicken is cooked through.
Remove the cooked chicken to a plate and shred or chop into smaller pieces.
Add the chicken back into the slow cooker.
Stir in the parmesan cheese, heavy cream and elbow pasta. Cover and cook on low for 30 minutes or until the pasta is tender
While the pasta is cooking start cooking the breadcrumb mixture
Add the butter and breadcrumbs to a pan on the stove and cook on medium heat until a deeper golden brown color forms. Remove from the heat
Once the pasta is tender, top each bowl with the breadcrumb mixture and mozzarella cheese.