Peel the cucumber, cut into small quarters and set aside.
Peel and dice the onion and let it turn translucent in a little fat in a hot saucepan. Add the minced meat and fry until it is crumbly and slightly brown. Add the cucumber pieces and stir-fry them vigorously for about 10 minutes. Add milk and vegetable stock and simmer in a closed saucepan for about 15 minutes until the cucumber pieces are cooked through. Stir in the herb cheese until it has dissolved.
Baguette goes well with it.
Note: The soup tastes best if you prepare it the evening before and eat it warmed up.