Preheat oven to 200C.

Season spinach with salt and pepper.

Butterfly the steak and pound it to about 1/4 inch thick.

Season with salt, pepper, onion powder, garlic powder, and parsley flakes.

Layer with spinach and feta leaving about 1/2 inch border clear.

Then layer with mashed potatoes.

Roll it up..

Here you can secure the flank steak with kitchen twine 1 inch apart.

Season with more salt and pepper and lay it on an greased baking pan.

Bake at 200C for 25 mins.

Brush on BBQ sauce and bake for another 5 minute.

Then allow to rest for 10 mins for the juices to redistribute before cutting into it.

Serve with a side dish.

Cook potatoes in a pot of salted water for 15-20 mins until soft.

Drain, add butter, black pepper, and mash.

Add milk while mashing till desired consistency.

You may want to season it with some salt to taste.