Mix 3 tablespoon soy sauce, 2 tablespoon sesame oil, 1 pinch of pepper with the minced meat.
Finely chop the onions, garlic cloves and ginger together (possibly also in a blender) and mix half of them into the minced meat and set aside.
Cut the cucumber into fine strips about 5 cm long and set aside (possibly also in a cool place).
Heat 2 tablespoons of oil in a wok and fry the onion, ginger and garlic mixture until lightly golden yellow and then add the minced meat and fry it over a medium heat, stirring constantly.
Deglaze with 2 tablespoons of rice wine or sherry, then add 4 teaspoons of hoisin sauce and chili powder to the desired degree of heat and stir for about 5 minutes on medium heat. Add 2-3 tablespoons of soy sauce, stir briefly, pour the broth on immediately and let simmer gently for 5 minutes.
Dissolve the starch in about 0.1 l cold water and pour it into the simmering minced meat sauce, stir immediately (otherwise it will get lumpy!) And simmer on a low flame while stirring constantly (max. 10 min.). Possibly season the sauce with a little soy sauce. It should be slightly creamy at the end (consistency like a Bolognese sauce).
In the meantime, add pasta water and cook the pasta according to the instructions on the packet.
Finally, drain the pasta, put it in a key and mix it with 2 tablespoons of sesame oil (so that the pasta does not stick together); Pour the creamy minced meat sauce over one half of the pasta and the cold cucumber strips (very refreshing) over the other half of the pasta and serve immediately.