01 -
Set the oven rack to the middle position and preheat to 400°F.
02 -
Pat the branzino dry with paper towels then cut two slashes on each side.
03 -
Sprinkle kosher salt and black pepper into the slashes and inside the cavity.
04 -
Fill the cavity with thinly sliced red onion and lemon pieces.
05 -
Place the fish on a baking tray and roast for approximately 5 minutes per side until the flesh is flaky.
06 -
Broil the fish for 3 to 4 minutes to achieve a slightly charred, crisp skin.
07 -
While the fish cooks, prepare the ladolemono sauce.
08 -
Transfer the cooked fish to a serving platter, pour ladolemono sauce over it, and scatter halved cherry tomatoes and chopped dill on top.