Season each fish fillet with salt and pepper and set aside.
Mix the sesame seeds and garlic into the softened butter, adding salt and pepper to taste. Spread top of the fish fillets with the mixture to form a 1/4-inch crust.
Pout the olive oil into a heated wok or nonstick skillet. When the oil is hot, sear each fillet on both sides and top and bottom. Be careful not to overcook the fish. When cooked, in about 1 minute, transfer to a warm plate and garnish with basil. Serve with Asparagus Relish.
Combine asparagus, garlic, ginger, tomato, bell pepper, salt and pepper and Black Sesame Dressing in a medium mixing bowl, stirring well. Refrigerate until ready to use.