Drain and rinse tofu; pat dry. Cut the block into 1-inch cubes.
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.
Notes: This is my favorite new soup We tripled the recipe. We added additional mushrooms, a few carrots, half a cabbage, and a splash of fish sauce. The fish sauce was a nice addition. My husband loved the soup tofu and all. This soup would be great with shrimp, steak, or chicken. This is a keeper. Pros: Sweet Heat
