In a small bowl, add the mushrooms. Cover them with boiling water and allow them to soak for at least 20 minutes.
Drain the mushrooms from the liquid, but be sure to reserve the liquid as well. Squeeze out excess liquid and chop mushrooms.
In a large skillet, over medium heat, add sesame oil, black bean sauce, and red chili flakes. Heat until fragrant, about 3 minutes.
Add garlic, tofu, ginger, mushrooms, ½ of the reserved liquid, and scallions to the skillet. Cook for about 10 minutes until the tofu is soaked in liquid and warmed through.