Dissolve 100g mung bean starch in 200g water.
Boil 1l water.
Add the dissolved starch mixture to the boiling water and stir until it thickens.
Pour into a container and let it set.
Mix warm water, sugar, salt, soy sauce, Chinese black vinegar, pressed garlic, chili oil with crisps, and toasted sesame seeds for the sauce.
Serve the set starch with the sauce and cucumber slices.
