Cut the beef brisket into bite-sized pieces.
Slice the onion, cucumber, avocado, and cherry tomatoes into bite-sized pieces.
Put rice in a bowl and top with the prepared vegetables and beef brisket.
Season the brisket with salt and pepper, then stir-fry in a pan.
Place the cooked brisket on top of the rice.
Drizzle poke sauce over the bowl, then sprinkle with seaweed flakes and sesame seeds to finish.