This is an easy peach tiramisu recipe that uses plenty of seasonal peaches and requires neither an oven nor a stovetop. Wash the peaches, remove the pits and peels, cut them into bite-sized pieces, and marinate them in granulated sugar and lemon juice. Whip chilled heavy cream, mascarpone cheese, and granulated sugar with a hand mixer to make a cream, then layer crushed cookies, marinated peaches, and cream alternately and chill until firm. Garnish with fresh peaches and berries for a refreshing dessert perfect for summer. It's an easy recipe that even beginners can make, and it looks gorgeous too.