Trim the leaves off the radishes, and wash them well in cold water to remove any dirt or grit.
Scrub the radishes and cut them in half.
Melt the butter in a medium skillet over medium-high heat and add the radishes, stirring to coat in the butter.
Reduce the heat to medium, add the miso and the broth or water, stirring until the miso is dissolved.
Add the honey and stir to coat the radishes in the butter-miso sauce.
Cover and cook, stirring occasionally, until the radishes are beginning to become tender-crisp, about 8-10 minutes.
If the sauce is getting too thick to coat the radishes, add another spoonful of water.
Increase the heat to medium-high, add the greens, and stir-fry until they’re wilted and bright green, about 2-3 minutes.
Sprinkle on the sesame seeds and serve.
