Preheat your oven to 400°F (200°C).

Lightly grease your baking dish with olive oil.

Place the flounder fillets in the baking dish, spaced evenly apart.

In a small bowl, combine the olive oil, lemon juice, garlic powder, dried parsley, salt, and pepper.

Using a cooking brush, evenly coat the fillets with the seasoning mixture.

Place the baking dish in the preheated oven and bake for 12 to 15 minutes.

If desired, switch to broil for the last 2 minutes for a crispy top.

Remove the flounder from the oven and let it rest for a minute.

Serve with your favorite sides.