Step 1

In a medium bowl, soak the rice cake in the hot water for 2 to 3 minutes, then drain all but about ½ cup water. Set aside.

Step 2

Preheat a wok over high heat until wisps of smoke rise from the surface. Swirl in the vegetable oil and let heat for a few seconds until it starts to shimmer. Add the greens and stir-fry for about 15 seconds. Add the mushrooms, carrots, and bean sprouts. Stir to combine. Add the rice cake and the reserved water, soy sauce, and black bean garlic sauce. Stir-fry for 2 minutes, or until well combined and the rice cake slices have softened. Finish with the sesame oil. Serve while hot.