Grilled Swordfish with Coriander and Lime

2 5-6 ounce swordfish steaks
2 tablespoons olive oil
ground coriander
salt and pepper
handful of cilantro leaves, coarsely chopped
2 tablespoons of butter at room temperature
1 lime
Preheat grill (or pan) to medium-high heat. Brush both sides of the swordfish steaks with olive oil then sprinkle salt, pepper and ground coriander on each side. Grill the steaks until cooked through, about 3-4 minutes on each side, depending on the thickness of the steaks. Remove the steaks and top with a dab of room temperature butter, coarsely chopped cilantro leaves and a spritz of lime juice.