Fast Steaks with Miso Mushrooms and Greens

This is your bistro-style steak, just with a Japanese-inspired glow-up. We're still serving a perfectly cooked (by you) rump with mushroom sauce, only we're making it a double-whammy umami hit with miso butter and we're tossing our greens with soy and sesame to really underline the theme. And, it's all done in 30 minutes or less, no less.