Firm tofu and shiitake mushrooms are braised in a savory sauce until deeply flavored and tender. This vegetarian dish is high in protein, naturally healthy, and ideal for a weight loss or clean eats plan.
Cut the firm tofu into 1-inch cubes and pat them dry with a paper towel. Slice the shiitake mushrooms and finely chop the scallion and garlic.
Heat the vegetable oil in a large nonstick skillet or braising pan over medium heat. Add tofu cubes in a single layer, browning each side gently for 3–4 minutes without breaking them.
Add the garlic and most of the scallion (save some for garnish) to the pan, sautéing for 30 seconds until fragrant.
Add the sliced mushrooms and sauté over medium-high heat for 2 minutes, stirring gently to combine with aromatic vegetables.
In a bowl, mix soy sauce, water, sugar, sesame oil, and ground black pepper. Pour this mixture into the pan, ensuring all ingredients are mostly submerged.
Bring the sauce to a gentle boil, then reduce heat to low, cover partially, and braise for 15–18 minutes until the tofu and mushrooms are infused and the sauce reduces.
Remove the cover in the last 5 minutes to let the sauce concentrate further. Adjust seasoning to taste and gently toss to coat all pieces evenly.
Serve hot, garnished with reserved scallions, taking care not to break the tofu cubes during plating.