Finely chop the onion, garlic and carrots and sauté. Finally add the zucchini and cook for another 10 minutes. Let the mixture cool down. Then season with egg, crème fraîche, salt and pepper.
Preheat the oven to 200 ° C top / bottom heat
Place the ham leaves on the puff pastry, add the filling and roll up. Brush with egg and bake on the middle rack for about 30 minutes.