Melt 125 g butter, let it cool down a little. Preheat oven (electric cooker: 180 °C/circulating air: 160 °C/gas: see manufacturer). Grease a square springform pan (24 x 24 cm). Put the biscuits in a large freezer bag, close the bag. Finely crumble the biscuits with a dough roll. Mix the crumbs with the liquid butter, put them into the form and press them to a flat bottom. Bake in a hot oven for about 10 minutes. Remove and let cool a little.
Slightly carve peaches crosswise. Blanch briefly in boiling water, rinse off, peel skin. Cut peaches in half, stone. For the cream, whisk condensed milk, cream, eggs and vanilla pulp.
When the mould has cooled down so that you can touch it, wrap the edge and bottom firmly with aluminium foil. Place 9 peach halves in the mould with the cut surface facing downwards (use 1 peach half for other purposes or cut it into small pieces and spread it between them). Pour cream into the spaces between the peaches. Bake in the oven at the same temperature for 35-40 minutes. Remove and let cool on a cake rack.
Select the raspberries, rinse carefully if necessary and dab dry. Finely puree 250 g raspberries and pass through a sieve into a small pot. Mix with sugar and bring to the boil. Stir the starch and lemon juice until smooth, use to thicken the puree. Spread the puree on the cream so that the peaches remain free. Decorate with the rest of the raspberries and let it set. Decorate with ice-cream waffles if you like.