1 tablespoon sherry
4 or 5 tablespoons red wine vinegar
2 tablespoons olive oil
1/4 teaspoon dried rosemary (1/2 teaspoon if fresh)
1/2 teaspoon black pepper
1/8 teaspoon salt
1 teaspoon minced garlic
1/4 teaspooon blackend steak seasoning (optional)
1/8 teaspoon dill
2 Shark steaks, close to an inch thick

Combine first 9 ingredients in a jar. Shake well. This is best if prepared much earlier than when you are ready to cook the shark to allow the ingredients to blend thier flavors. Pour half the mixture with the shark steaks in a bowl and let marinate for about 20 minutes turning once or twice. Then place on the grill and cover and cook until meat begins to flake off. You can pour remaining mixture over shark while cooking.