01 - Preheat oven to 400°F. Line baking sheet with parchment paper or lightly oil baking dish.
02 - Arrange salmon fillets, skin-side down, on prepared sheet. Season each fillet with salt, pepper, and drizzle with olive oil.
03 - Spread 1 tablespoon pesto evenly over top of each salmon fillet.
04 - Scatter halved cherry tomatoes and red onion slices around salmon. Drizzle remaining olive oil over vegetables. Season with salt, pepper, and lemon zest.
05 - Bake for 15-18 minutes until salmon flakes easily with fork and tomatoes are soft and blistered.
06 - Serve hot, garnished with fresh basil leaves and lemon wedges.