Preheat the oven to 400°F (200°C).
Prepare the marinade by whisking together olive oil, minced garlic, lemon juice, lemon zest, oregano, salt, and pepper.
Place the salmon fillets on one side of a large sheet pan and arrange the cherry tomatoes, zucchini, and red bell pepper on the other side.
Drizzle the marinade over the salmon and vegetables, ensuring everything is well-coated.
Roast in the preheated oven for 15-20 minutes or until the salmon flakes easily with a fork.
Serve immediately, garnished with additional lemon slices and fresh herbs if desired.