Slice the carrots into small pieces. Finely dice the zucchini, bell pepper and onion. Put everything together with the cheese, cream cheese, vegetable stock and salt in a bowl and stir until everything is well mixed.
Spread the mixture on the puff pastry and then roll up the puff pastry. Fold approx. 1 cm of the dough upwards at both ends and press it shut so that nothing runs out of the sides.
Bake the roll in a preheated oven at 200 ° C (top / bottom heat) for about 25 minutes with the long opening facing up (attention: the filling becomes quite liquid when heated, so you should put the roll on a sheet if it does rises.)
I recommend Emmentaler cheese and a low-fat cream cheese with it (so that your figure doesn`t suffer so much). If you like, you can intensify the cheese taste with a little parmesan. Simply add to the mixture.
For the vegetable broth, I use organic vegetable broth. It doesn`t contain any flavor enhancers (the cheese and vegetables give enough flavor), and a little salt is added anyway. Of course, you can also use other types of vegetables, I think there are no limits to your imagination.