In a small bowl, combine the softened butter, miso, sriracha, and lime juice together.
Smoke the oysters
Remove the oysters from the grill rack and top them with 1/2 teaspoon of the miso butter mixture. Then return the oysters to the grill for another 3 minutes.
Dress the smoked suckers
Top the oysters with spring onions and lime wedges. Enjoy!