Scrape out the vanilla pod. Put the pulp and the scraped pod into a sufficiently large saucepan. Peel and core the peaches. Cut into small pieces and add to the saucepan. Stir in the lemon juice and preserving sugar and let stand covered for an hour. Then go through it briefly with the hand blender (be careful not to mix the vanilla pod with the puree), some larger pieces should be retained. Now bring the mixture to the boil and continue to boil for about 5 minutes. Make a gel test. Remove the vanilla pod. Now pour hot into prepared glasses. Turn upside down and let cool down.
For me there are always 5 small glasses, capacity approx. 250 ml.