Sheet Pan Fish Fillets with Smashed Potatoes and Green Beans

Steps

1. Preheat oven to 425°F. To a microwave-safe medium bowl, add the potatoes and ½ cup water. Season with salt and pepper. Cover with vented plastic and microwave 6–8 min., until mostly tender. Remove plastic, drain water, and let potatoes cool slightly.
2. To a large rimmed parchment-lined baking sheet, add the green beans and 1 tbsp oil. Season with salt and pepper. Toss to combine. Move beans to be on one-third of baking sheet.
3. Evenly distribute potatoes next to green beans on baking sheet. Using a potato masher or fork, gently smash each potato to ½ inch in height. Drizzle 1 tbsp oil over potatoes and season with salt and pepper.
4. Add the fish fillets to baking sheet. In a small bowl, combine remaining 1 tbsp oil, mustard, and lemon juice. Brush mustard mixture on top of fish. Bake 20–25 min., until potatoes are crispy and fish flakes easily with a fork. Garnish with the herbs to serve, if desired.