b'YOU WILL NEEDFOR THE SALSA: FOR THE HALIBUT: cup extra virgin olive oil 4 1-inch-thick halibut fillets, cup balsamic vinegar56 ounces each teaspoon C&H or Domino sugar Olive oil, for brushing fillets 1 teaspoon salt Salt and pepper to taste 1 teaspoon pepper 4 tablespoons extra light olive oil large red onion, peeled and finely diced 12 tablespoons butter (optional) cup white balsamic vinegar mixed with cup water 4 large tomatoes, seeded and cut in -inch dice1 cucumber, cut in -inch dice1 teaspoon onion powder1 teaspoon garlic powder1 tablespoon dried oregano or 2 tablespoonschopped fresh oregano16 fresh basil leaves, chopped or torncup crumbled feta cheese'