Preheat the oven to 400°F.
Line a sheet pan with parchment paper or foil. Place the salmon fillets on the pan.
Brush the salmon generously with the Korean BBQ sauce.
Roast the salmon for 12–15 minutes, or until cooked through and it flakes easily with a fork.
While the salmon cooks, prepare the rice or farro according to package directions, if not already cooked.
In a medium bowl, combine the cabbage, carrots, and cucumber.
Drizzle the vegetables with the sesame seed oil and add a pinch of salt. Toss gently to evenly coat.
To assemble the bowls, divide the rice or farro among four bowls.
Top each bowl with the sesame-dressed vegetables and a piece of salmon.
Finish with sliced scallions and sesame seeds before serving.