Preheat oven to 400 degrees. Place a 12-ounce bass fillet in center of a 16-by-20-inch piece of parchment. Whisk together 1/2 teaspoon sugar and 3 tablespoons soy sauce; drizzle over fish. Sprinkle with 3 tablespoons julienned fresh ginger. Fold edges to seal. Place on a baking sheet; bake for 12 minutes.
For this variation on steaming, wrap fillet in a single-serving parchment packet. Cook fillet just until done, usually when the package is puffy and the paper has browned.