Puff pastries with a fridge-clear-out filling

Adjust servings in the full version
Today we are cooking along to Clair Obscur: Expedition 33 OST - Lumiere (Metal cover by DeadlyDesiree)
Each finished bun weighs about 100 g on average. A little gift for anyone tracking calories and macros: I promise I planned it that way!
Defrost the dough according to the manufacturer's instructions.
Preheat the oven to 180 degrees.
Chop the mushrooms and onions and fry them together with the minced meat. Salt and other spices to taste
Lightly sprinkle the table, rolling pin, dough and everything else around with flour. Roll out the dough layer to a 2:3 rectangle, cut into 6 squares
We spread the filling. First, a circle of ketchup (thick is better, it turns out juicier), then a multicooker spoon of minced meat, a tablespoon of chopped cucumbers, a spoonful of carrots and a slice of cheese
Bring two opposite corners together and pinch to seal, then repeat with the other pair. Pinch the 4 new corners shut as well so the filling cannot escape.
Prepare for the oven: break the egg into a mug, stir with a fork. Brush the buns with this egg and sprinkle with sesame seeds.
Let it cool a little, and you can taste the fruits of your labor