Preheat oven to 425°.
Place fillets in a 13 x 9-inch baking dish coated with cooking spray. Combine sugar, syrup, soy sauce, mustard, and black pepper; pour sugar mixture over fillets. Cover with foil; bake at 425° for 10 minutes. Remove foil; sprinkle the fillets with almonds. Bake an additional 10 minutes or until fish flakes easily when tested with a fork. Serve with sugar mixture.