Rocket & mustard butter
Mix all the ingredients together.
Brush the tomatoes with the butter and individually wrap them in foil.
Grill for approx. 10 mins. on a high heat or bake for approx. 15 mins. in the centre of an oven preheated to 200°C. Season the meat. Brush the griddle with oil, heat up. Grill the steak for approx. 6 mins. on each side.