01 - In a large mixing bowl, whip the cold heavy cream with powdered sugar, lemon zest, lemon juice, vanilla extract, and bourbon until stiff peaks form. Refrigerate until ready to use.
02 - Spread a thin layer of whipped cream in the bottom of a 9-inch (23 cm) loaf pan or baking dish to help the cookies adhere.
03 - Arrange a single layer of pecan cookies over the whipped cream.
04 - Spread half of the peach jam evenly over the cookies.
05 - Top with a third of the whipped cream, spreading gently.
06 - Arrange half of the peach slices over the cream.
07 - Repeat layering: cookies, remaining jam, another third of whipped cream, remaining peach slices.
08 - Finish with a final layer of cookies and the rest of the whipped cream, smoothing the top.
09 - Cover tightly with plastic wrap and refrigerate for at least 6 hours, preferably overnight, to allow the layers to meld.
10 - Before serving, garnish with extra peach slices, chopped pecans, and fresh mint if desired. Slice and serve chilled.