Step by Step Process: 1. Cook the sushi rice according to the package instructions. Once cooked, transfer it to a large bowl and let it cool slightly. 2. In a small bowl, mix the rice vinegar, soy sauce, and sesame oil. Pour this mixture over the cooked sushi rice and gently fold it in to evenly coat the rice. Set aside. 3. Prepare the toppings by slicing the fish, cucumber, carrot, and avocado into bite-sized pieces. 4. To assemble the sushi bowl, divide the seasoned sushi rice among three bowls. 5. Arrange the sliced fish, cucumber, carrot, and avocado on top of the rice in an organized manner. 6. Sprinkle each bowl with nori strips, black sesame seeds, and pickled ginger (if desired). 7. Serve the sushi bowls with an additional side of low-sodium soy sauce for dipping. Nutritional Information (per serving): - Calories: Approximately 500 calories - Protein: Approximately 36 grams - Fat: Approximately 17 grams Note: The nutritional information provided is an estimate and may vary depending on the specific ingredients used.