And now the part with the preservative. This salad usually goes very well, but provided you have a good, cool and closed pantry. If you keep them on the balcony, I recommend putting 1 aspirin pill in each jar (above). In winter, when you open the jar, you will see that the pill stays that way, take it out with a spoon and eat the salad quietly. It doesn't change the taste of the vegetables at all, and if you don't want to end up like me when in a year I threw away 20 jars of salad, because I didn't put preservatives.
If you can't see the pill on top in winter, then you will realize that she did her job, that jar was in trouble and she was taking aspirin.
So optionally put aspirin and staple the jars well, check that the liquid does not flow from them and does not leave air.