1. To begin, gently place the boneless turkey breast in your slow cooker, ensuring it sits evenly within the vessel. In a separate bowl, whisk together the maple syrup, apple cider vinegar, Dijon mustard, thyme, garlic powder, and onion powder until the mixture is well-combined.

2. Next, pour this flavorful marinade over the turkey breast, making sure to coat it evenly on all sides. Season the turkey generously with salt and pepper, to your personal taste preferences.

3. Cover your slow cooker and set it to the low setting. Allow the Slow Cooker Amish Maple Turkey Breast to cook for 6-7 hours, or until the internal temperature reaches a safe 165°F (74°C) when measured with a meat thermometer.

4. Once the Slow Cooker Amish Maple Turkey Breast is cooked to perfection, remove it from the slow cooker and let it rest for 10-15 minutes. This resting period allows the juices to redistribute throughout the meat, resulting in a juicier and more flavorful turkey when sliced.

5. Serve the Slow Cooker Amish Maple Turkey Breast with your choice of sides, such as creamy mashed potatoes, roasted vegetables, or a tangy cranberry sauce.