Meanwhile, heat a wok or large skillet on medium high heat. Drizzle with oil and then add the white parts of the scallions and the ginger. Bloom for 30 seconds until fragrant and then add the cabbage, season with 1 teaspoon of salt and toss until the cabbage is slightly softened, 3 to 4 minutes. Add the broccoli and garlic and toss until combined. Next, add the rice cakes, black bean sauce, soy sauce or tamari, and toss well to coat, until the rice cakes are hot, 2 to 4 minutes. Add the tofu and toss gently.