Spray 4 (10 ounce) microwave-safe custard cups with nonstick spray coating. Line cups with fillets, trimming and piecing as necessary. Fill centers with spinach mixture. Cover with waxed paper. Cook on high 5 to 6 minutes or until fish just flakes and stuffing is hot, rotating and rearranging cups once. Makes 4 servings. Calories: 178 per serving. Protein: 23 gm. Carbohydrate: 12 gm. Fat: 4 gm. Sodium 475 milligrams. Cholesterol: 41 milligrams.