Add the turkey breast straight into your slow cooker.
In a bowl, whisk together the BBQ sauce, cranberry sauce, mustard, brown sugar, onion powder, garlic salt, smoked paprika, and black pepper until smooth and combined.
Scoop out about ½ cup of the sauce and set it aside for later.
Pour the rest of the sauce over the turkey. Pop the lid on and cook on low for 6 hours or high for 4, until the turkey is fall-apart tender.
Once it’s cooked, shred the turkey right in the slow cooker or transfer it to a cutting board if that’s easier.
Preheat your oven to 350°F.
Slice the Hawaiian rolls in half horizontally and place the bottom halves in a baking dish.
Lay down your slices of cheese, then pile on that juicy shredded turkey.
Drizzle the reserved sauce over the top of the meat, then place the top half of the rolls on.
In a small bowl, stir together the melted butter, smoked paprika, brown sugar, garlic salt, onion powder, black pepper, and parsley.
Pour that flavorful butter mixture all over the tops of the rolls—get it into all the nooks.
Bake for 15–20 minutes, until the tops are golden and the cheese is nice and melty.
Serve warm and watch them disappear.