01 - Preheat the oven to 400°F. Line a large baking sheet with parchment paper or foil for easy cleanup.
02 - In a small bowl, whisk together olive oil, lemon juice, lemon zest, garlic, oregano, salt, and black pepper.
03 - Place green beans on one side of the prepared baking sheet. Drizzle with half of the marinade and toss to coat. Spread into an even layer.
04 - Arrange salmon fillets, skin-side down, on the other side of the baking sheet. Brush the tops of the fillets with the remaining marinade.
05 - Roast for 15–18 minutes, or until the salmon is opaque and flakes easily with a fork, and the green beans are tender-crisp.
06 - Remove from oven. Garnish with lemon wedges and parsley if desired. Serve immediately.