Place softened butter and miso paste in a small bowl. Mix until combined and set aside.
Heat 1 tbsp of miso butter and 1 tbsp of olive oil in skillet over medium high heat. Be careful not to burn the miso butter. Once the skillet has heated up for about 1 minute, cook the scallops, working in 2 batches. Place the scallops in the pan and sear for 1-2 minutes, until browned. Flip and sear for 1-2 more minutes. Remove scallops from the skillet. Add another 1 tbsp of miso butter and 1 tbsp of olive oil in the pan and repeat with remaining scallops.
Reduce the heat to medium low, add 2 tbsp of miso butter and water to the pan. Scrape the bottom of the skillet with a wooden spoon or spatula. Simmer the sauce for 2-3 minutes until thickened. Pour the pan into a small side dish.
Increase the heat back up to medium high heat. Add 1 tbsp of olive oil and minced garlic to the pan. Cook for 1 minute. Add the bok choy to the pan. Cook and toss the bok choy for 4-5 minutes, until tender. Add soy sauce and cook for 1 more minute.
Place the bok choy in a serving dish. Top with scallops and pour pan sauce over the scallops and bok choy.
