Place blueberries & peaches in a bowl. Add lemon zest, lemon juice, and sugar. Stir until sugar is mixed with fruit and juices begin to form. Cover and refrigerate until chilled, about 1 hour.
For the whipped cream:
Place heavy cream in a cold bowl. Add sugar and vanilla extract. Beat until mixture has soft peaks for 5 to 8 minutes.
Assemply:
Crumble cookies roughly.
Place some cookie crumbs at the bottom of each serving dish. Spoon in some of the fruit and a layer of whipped cream. Repeat layers, ending with some nutmeg and lemon zest.
Recipe by The FrangloSaxon Cooks at https://franglosaxon.com/fruit-fool/