Begin by preparing the turkey breast. Pat it dry with paper towels to remove excess moisture.
In a small mixing bowl, combine the garlic powder, onion powder, thyme, rosemary, salt, and black pepper.
Rub the olive oil over the turkey breast, ensuring it is evenly coated.
Sprinkle the seasoning mixture over the turkey breast, ensuring to cover all sides.
Pour the chicken broth into the bottom of the crockpot.
Place the seasoned turkey breast into the crockpot, ensuring it is submerged in the broth.
Cover the crockpot with the lid and set it to cook on low for 6 hours, or until the internal temperature of the turkey reaches 165°F.
Once cooked, carefully remove the turkey breast from the crockpot and let it rest for 10 minutes before slicing.
Serve the turkey slices warm, drizzled with some of the cooking juices, and garnish with fresh parsley.