Combine shallot, ginger, garlic, miso paste, rice wine vinegar, sesame oil, oil, and honey in a blender or food processor. Blend until smooth and creamy. This step creates a rich, flavorful sauce that coats the steak perfectly.
Cut steak into 1.5-inch cubes and season lightly with salt and plenty of black pepper. Prepare rice and greens, either raw or cooked. Having everything ready is key since the steak cooks quickly.
Heat a skillet over medium-high heat and melt butter. Add dark soy sauce and sear steak in a single layer. Don’t disturb the meat for 30–45 seconds, then flip for a quick sear to medium-rare.
After removing steak, cook greens in the same pan drippings. No extra seasoning is needed since the steak juices add flavor.
Scoop rice into bowls, top with steak bites and greens, then drizzle generously with the miso-ginger dressing. Serve immediately for the best taste.