Mix the dry yeast and sugar with the warm water and let rise in the oven at 40 ° C for about 5 minutes.
Put all the ingredients for the dough with the water and the yeast in a bowl and knead to a light dough. Take the batter out of the bowl and rub a little rapeseed oil into the bowl. Then put the dough back in the bowl, dust with a little wheat flour and cover with a cloth.
Let the dough rise in the oven at 40 ° C for one hour.
For the topping, finely chop the vegetables and mix with all the ingredients for the topping.
Preheat the oven to 230 ° C.
Rub your hands with a little rapeseed oil to prevent the dough from sticking. Divide the dough into 9 portions and place on a baking sheet with baking paper. It is very important not to squeeze the dough too much so that it stays airy. Gently press the dough balls into small flat cakes with your fingertips. Cover the dough with the minced meat mixture and spread it evenly with your fingertips.