Preheat the oven to 400°F (200°C).

Pat the flounder fillets dry with paper towels and season both sides with salt and pepper to taste.

In a shallow bowl, combine the flour, Panko breadcrumbs, and grated Parmesan cheese.

Dip each fillet into the flour mixture, shaking off any excess.

Place the fillets on a greased baking dish.

In a small bowl, whisk together the melted butter, lemon juice, and minced garlic.

Pour the butter mixture over the fillets, making sure they are evenly coated.

Bake the flounder in the preheated oven for 12-15 minutes, or until the fillets are cooked through and flaky.

Remove from the oven and garnish with chopped parsley and lemon slices.

Serve immediately with steamed vegetables or rice, if desired.

Enjoy your delicious Baked Flounder with Lemon and Butter!