Soak Breadcrumbs: In a medium mixing bowl, stir together the breadcrumbs and milk. Allow the mixture to sit for a few moments so that the milk is absorbed into the breadcrumbs.

Combine Ingredients: To the breadcrumb/milk mixture, add the ground turkey, ground beef, tomato sauce, oats, eggs, black pepper, sea salt, celery salt, chili powder, onion powder, garlic powder, and Worcestershire sauce. Use gloved hands to mix the ingredients until thoroughly combined.

Form Loaves: Divide the meat mixture in half and form into two loaves. You can cook both now if they will fit in your crockpot or freeze one loaf for cooking later.

Prepare Crockpot: Place one loaf into the bottom of the crockpot.

Make Glaze: Whisk together the ketchup, remaining tomato sauce, Worcestershire sauce, black pepper, sea salt, brown sugar, mustard, apple cider vinegar, and water until fully combined and smooth.

Add Glaze: Pour half of the glaze over the loaf (or all of the glaze if you are cooking both loaves).

Cook: Cover the crockpot with the lid and cook on LOW for 3 hours or until the internal temperature of the meatloaf registers 165°F.

Serve: Slice the meatloaf and serve with the sauce from the crockpot. Garnish with fresh Italian parsley.