Preheat your oven to 400°F (200°C).
Season the salmon fillet with salt and pepper.
Place the salmon on a baking sheet lined with parchment paper.
Bake the salmon for 12-15 minutes or until cooked through.
While the salmon is baking, cook quinoa or brown rice as per package instructions.
In a bowl, combine mixed greens, cherry tomatoes, and cucumber.
Drizzle with olive oil and lemon juice, and toss to combine.
Once the salmon is done, remove it from the oven and let it cool slightly.
Flake the salmon into large pieces.
Assemble the bowl by placing quinoa or rice at the bottom, topped with the mixed salad, avocado, onions, and salmon.