2 tablespoons olive oil, plus more for the pan
Six 3- to 4-ounce branzino fillets, bones removed
Kosher salt and freshly ground black pepper
1/2 cup flat-leaf parsley, finely chopped
1 tablespoon good-quality extra-virgin olive oil
Pinch crushed red pepper flakes
- Preheat the oven to 375 degrees F. Generously grease a large rimmed baking sheet with olive oil.
- Arrange the fillets on the baking sheet in one layer. Drizzle the 2 tablespoons of olive oil over the fish and season with salt and black pepper. Bake until the fish is flaky and just fully cooked through, about 12 minutes.
- Meanwhile, finely grate the zest of 1 lemon and 1 orange into a small bowl and add the parsley, good olive oil, red pepper flakes, a pinch of salt, a few grinds of black pepper, juice of half the lemon and juice of half the orange. Stir gently to combine.
- Slice the remaining lemon and orange. Serve the fish topped with the gremolata and citrus slices.