Instructions:
- Preheat oven to 400°F (200°C). Line a large rimmed baking sheet with parchment paper.
- In a large mixing bowl, toss the cut potatoes with 2 Tbsp of olive oil, 1 tsp salt, 1/2 tsp pepper, and garlic powder. Spread potatoes in a single layer on one half of the prepared baking sheet.
- Roast the potatoes for 15 minutes to give them a head start.
- While potatoes roast, trim the green beans. In a small bowl, whisk together the remaining 2 Tbsp olive oil, lemon juice, minced garlic, chopped dill, oregano, 1/2 tsp salt, and 1/4 tsp pepper to create the dressing.
- Remove the sheet pan. Push the potatoes to one side and scatter the trimmed green beans onto the empty half. Gently toss the green beans with 1 Tbsp of the prepared dressing mixture.
- Pat the salmon fillets dry and place them skin-side down nestled among the green beans. Brush or spoon the remaining dressing generously over the top of the salmon fillets. Top each fillet with 1-2 thin lemon slices.
- Return the sheet pan to the oven. Roast for an additional 12–15 minutes, or until the salmon flakes easily with a fork and the potatoes are fork-tender.
- Serve the Sheet Pan Salmon with Green Beans and Potatoes immediately, optionally adding an extra squeeze of fresh lemon juice.