Preheat oven 180°C (160°C Fan Forced). Combine, butter, onion, prawns, tomato paste, McCormick Garlic Powder, McCormick Parsley Flakes and diced tomatoes in a small baking dish. Season with McCormick Sea Salt and Black Pepper and stir well.
Cover baking dish with foil and bake for 30 minutes or until prawns have changed colour and are cooked through.
Serve topped with feta and bread to mop up the sauce.
Cooked in individual dishes, this can make an impressive entrée.