- Place the chicken breasts in the slow cooker.
- Add the chicken broth, garlic powder, onion powder, salt, and pepper.
- Cover and cook on low for 6-7 hours or until the chicken is cooked through.
- Remove the chicken and shred it with two forks.
- Return the shredded chicken to the slow cooker.
- Add the gluten-free penne pasta, diced tomatoes, and both cheeses.
- Stir well to combine and cover again.
- Cook on low for an additional 30 minutes or until the pasta is tender and the cheese is melted.
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