Optional: In a large bowl, marinate pork loin in bottle of Italian Dressing for four hours or up to one day ahead of cooking.

Remove pork loin from marinade and pat dry with paper towel.

Using a large, thin knife, cut into pork loin to "unroll" and lay flat.

Season well with salt, pepper, and garlic powder.

In a medium sized bowl, combine 1/2 breadcrumbs, cream cheese, mozzarella cheese, riced broccoli, onion, and parsley.

Spread cheese and broccoli mixture on unrolled pork loin.

Roll pork loin back up, taking care to not push all stuffing out.

Rub outside of pork in softened butter and sprinkle rest of bread crumbs on top.

Place on baking sheet and bake at 350 until instant read thermometer reads 145 degrees inserted into thickest part of pork.

Remove from oven and tent with foil for 10 minutes.

Carve and enjoy!