01 - Preheat the oven to 425°F. Line a large rimmed baking sheet with parchment paper or foil for easy cleanup.
02 - In a small bowl, whisk together olive oil, lemon zest, lemon juice, garlic, salt, pepper, oregano (or thyme), and smoked paprika if using.
03 - Place green beans on one side of the baking sheet. Drizzle with half the marinade and toss to coat evenly. Spread them out in a single layer.
04 - Arrange salmon fillets on the other side of the sheet, skin-side down if applicable. Brush the tops with the remaining marinade.
05 - Roast in the preheated oven for 15–18 minutes, or until salmon flakes easily with a fork and green beans are tender yet crisp.
06 - Remove from oven. Garnish salmon and green beans with fresh parsley and serve with lemon wedges on the side.