Preheat oven to 400°F. Place parchment paper or silicone mat onto a sheet pan or baking dish large enough to fit the two fish.
Rinse the fish, pat dry and place on a sheet pan.
In a bowl mix ghee, rosemary, oregano, lemon juice, garlic, salt and pepper. Slather this mixture over the top and inside the cavity of the fish.
Place lemon slices into the cavity of the fish.
Before roasting the fish, make 3-4 slits on the skin of the fish. This allows the seasoning spread through the flesh and the skin to crisp. Be careful to not cut deep into the flesh.
Place the sheet pan with the fish into the preheated oven for 15-18 minutes or until the fish flesh is white and flaky.
Turn oven to broil and cook fish for 2-3 minutes until skin blisters. Be careful to not completely burn the skin.
Remove from the oven, transfer to a serving plate and serve with lemon wedges.