Step 1

Drain and rinse tofu; pat dry. Cut the block into 1-inch cubes.

Step 2

Heat oil in a Dutch oven over medium heat. Add ginger and garlic; cook, stirring, until fragrant, about 1 minute. Add mushrooms and cook until slightly soft, 2 to 3 minutes. Stir in sugar, broth, soy sauce and chile-garlic sauce; cover and bring to a boil. Add bok choy and tofu, cover and simmer until greens are wilted, about 2 minutes. Raise heat to high and add the noodles, pushing them down into the broth. Cook, covered, until the noodles are tender, 2 to 3 minutes. Remove from the heat and stir in cilantro.