2 6-8 ounce pieces Mahi Mahi (halibut or sea bass would be a good substitute, but may cook more quickly)
Salt and freshly ground black pepper, to taste
1 teaspoon sugar, preferably raw (also known as turbinado)
2 tablespoons olive oil
2 tablespoons butter
1/2 teaspoon crushed garlic
1/2 cup chopped tomato
1 lime, cut in half
1/4 cup chopped parsley