Creating this delicious Thanksgiving Slow Cooker Turkey Meatloaf is simple if you follow these step-by-step instructions:

1. Prepare Vegetables: Chop the onion, bell pepper, and zucchini. Squeeze out any excess moisture from the zucchini using a clean kitchen towel.
2. Mix Ingredients: In a large bowl, combine ground turkey, chopped onion, bell pepper, grated zucchini, garlic, breadcrumbs, egg, milk, Worcestershire sauce, Dijon mustard, thyme, oregano, salt, pepper, and ketchup.
3. Combine Mixture: Use your hands to mix everything well until just combined. Avoid overmixing, as this can make the meatloaf tough.
4. Shape the Meatloaf: Form the mixture into a loaf shape that will fit into your slow cooker.
5. Prepare Slow Cooker: Coat the bottom of the slow cooker with cooking spray or line it with parchment paper for easier cleanup.
6. Place Meatloaf Inside: Carefully transfer the meatloaf into the slow cooker, adjusting its shape as needed to fit snugly.
7. Add Topping (Optional): If desired, spread additional ketchup over the top of the meatloaf for added flavor and moisture.
8. Cover and Cook: Place the lid on the slow cooker and cook on low for 6-7 hours or on high for 3-4 hours.
9. Check Doneness: Ensure the meatloaf has reached an internal temperature of 165°F (75°C) using a meat thermometer.
10. Rest Before Slicing: Once cooked, allow the meatloaf to rest in the slow cooker for 10-15 minutes before slicing to retain its moisture.

This step-by-step guide will help you create a flavorful Thanksgiving Slow Cooker Turkey Meatloaf that will impress your family and friends with minimal effort!