Make the dough

1. Combine the flour, warm water, salt and oil in a mixing bowl. Knead until forms a smooth ball.
2. Rest for 30 minutes.

Make the filling

1. Chop the onion and mushroom into thin slices.
2. On a pan on medium-high heat, add in the oil, followed by the onions. Stir until golden, for about 5 mins. Add in the mushroom slices until wilted, season with salt and pepper.

Make the dumplings

1. After resting, roll the dough out on a floured surface. Use a round cup to form small dumpling wrappers.
2. Add 1 tbsp to each wrapper, close the wrapper and shape into the dumpling shape (view the video).
3. After wrapping all the dumplings, put them in boiling water and cook until they float on top.
4. Serve with fried onions and vegan sour cream.