In a large bowl, combine the all-purpose flour and warm water.
Mix until a dough forms, then knead it for about 5 minutes until smooth.
Cover the dough with a damp cloth and let it rest for 30 minutes.
In a pan, heat a teaspoon of sesame oil over medium heat.
Add minced garlic and grated ginger, sautéing until fragrant.
Add chopped mushrooms and cook until they release their moisture and turn golden.
Incorporate the minced tofu, chopped scallions, soy sauce, rice vinegar, and a pinch of salt and pepper.
Stir-fry for a few minutes until the mixture is well combined and flavorful.
Remove from heat and let the filling cool down.
Roll out the rested dough into a thin sheet and use a round cookie cutter to cut out circles.
Place a small spoonful of the filling into the center of each dough circle.
Carefully fold the circle in half, creating a half-moon shape.
Pinch the edges together to seal the dumpling, creating pleats if desired.