Clean the vegetables and cut them into as fine cubes as possible. Fry the mince with a little oil and add the vegetables. Mix in the tomato paste and stock. Season to taste and let cool down a little.
Put the puff pastry on a baking tray and brush with sour cream (makes the dish more juicy). Then fill the puff pastry with the minced vegetable mixture and seal. Sprinkle cheese on top and bake in the oven at approx. 180 ° until the cheese is brown.
Leftover sour cream, potatoes or salad go great with it.