Making sushi rolls with brown rice can be a fun and rewarding kitchen activity. Follow these simple steps to create your delicious rolls:

1. Rinse the Rice: Rinse the brown rice under cold water until the water runs clear. This removes excess starch and prevents the rice from being too sticky.
2. Cook the Rice: In a medium saucepan, combine the rinsed rice and 4 cups of water. Bring to a boil over high heat, then reduce the heat to low, cover, and simmer for 40-45 minutes or until the rice is tender and all the water is absorbed.
3. Prepare Vinegar Mixture: In a small bowl, combine the rice vinegar, sugar, and salt. Stir until the sugar dissolves.
4. Season the Rice: Once the rice is cooked, remove it from heat and let it cool slightly. Gradually stir in the vinegar mixture, incorporating it gently into the rice.
5. Prepare the Fillings: While the rice cools, slice your avocado, cucumber, carrot, and bell pepper into thin strips. If using fish, make sure it is sliced into thin, manageable pieces.
6. Lay Out Nori: Place a sheet of nori, shiny side down, on a bamboo sushi mat or a clean surface.
7. Spread Rice: Moisten your hands and grab a handful of seasoned brown rice. Spread it evenly over the nori, leaving a 1-inch border at the top edge.
8. Add Fillings: Lay your desired fillings horizontally across the center of the rice.
9. Roll It Up: Starting from the bottom (the edge closest to you), use the bamboo mat or your hands to roll the sushi tightly away from you. Apply gentle pressure to keep it compact as you roll.
10. Seal the Roll: When you reach the bare edge of the nori, wet it with a little water to seal the roll. Press gently to secure it.
11. Slice the Rolls: Using a sharp knife, slice the sushi roll into bite-sized pieces. A damp knife will help achieve cleaner cuts.
12. Repeat: Continue the process with the remaining nori sheets and fillings until all ingredients are used.