Preheat the oven to 400°F. Line a baking sheet with parchment paper.
Place the salmon fillets on the prepared baking sheet. Drizzle with olive oil and season with garlic powder, onion powder, smoked paprika, salt, and pepper.
Bake the salmon for 12-15 minutes, or until it flakes easily with a fork.
While the salmon is baking, prepare the rice bowls. Divide the cooked brown rice among four bowls.
Once the salmon is done, flake it into large pieces and distribute it evenly over the rice.
Top each bowl with cherry tomatoes, avocado slices, corn, and chopped cilantro.
Squeeze lime juice over each bowl and add a dollop of Greek yogurt or sour cream if desired.
Serve immediately and enjoy!