1️⃣ Preheat Oven: Set to 375°F (190°C).2️⃣ Prepare the Fish: Pat dry, season with salt, pepper, lemon zest, and garlic powder. Let marinate for 15 minutes (optional).3️⃣ Prepare Filo Dough: Lay 1 filo sheet flat, brush with butter, add another sheet on top, and repeat (use 2-3 sheets per fish fillet).4️⃣ Wrap the Fish: Place fillet in the center, spread Dijon mustard (if using), wrap like a parcel, and tuck in edges.5️⃣ Bake: Transfer to a baking sheet, brush with butter or oil, and sprinkle with sesame seeds. Bake for 18-22 minutes until golden brown.6️⃣ Serve: Rest for 2-3 minutes before slicing. Serve with lemon wedges and dipping sauce.