Cook the brown rice according to package instructions.
Preheat a skillet over medium heat.
Season the salmon fillet with salt and pepper.
Place the salmon skin-side down in the skillet.
Cook for about 4-5 minutes on each side, or until cooked through.
Remove the salmon from the skillet and let it rest.
Steam the broccoli until tender, about 3-4 minutes.
Slice the cucumbers and shred the carrots.
In a bowl, layer the cooked brown rice at the bottom.
Top with the cooked salmon, broccoli, cucumbers, carrots, and red onion.