Position rack in center of oven and preheat to 350 degrees F.

Spray 1 half-sheet pan with nonstick cooking spray. Line bottom of pan with parchment paper; spray paper. Sift flour and next 6 ingredients into medium bowl. Mix in crystallized ginger. Using an electric mixer, beat butter in large bowl until fluffy. Beat in brown sugar. Beat in eggs, 1 at a time. Gradually beat in molasses, followed by 1 cup boiling water. Mix in grated lemon peel. Gradually mix in dry ingredients. Transfer batter to prepared pan. Bake until a tester inserted into the center of the cake comes out clean, about 20 to 25 minutes. Transfer to a rack to cool for 15 minutes. Run a knife around the pan sides. Turn out onto a rack and peel off paper. Cool and cut into 1-inch cubes.

To assemble: Using a trifle bowl, start with an even layer of gingerbread cubes, top with 1/3 of the lemon curd mixture, and 1/3 of the blackberry sauce. Repeat 2 more times. Top with remaining whipped cream. Cover and refrigerate for at least 4 hours or overnight before serving.

Lemon Curd Filling: Place lemon curd in a large bowl. Fold in half of the whipped cream until combined. Refrigerate if not using immediately. Reserve remaining whipped cream for the top of the trifle.

Blackberry Sauce: Place blackberries, sugar, and salt in a medium saucepan and cook until the berries are soft and the sugar has melted. Transfer to a blender and blend until smooth. Pour through a strainer into a bowl. Stir in the framboise and lemon juice. Set aside until ready to use.

For the Curd: 3/4 cup freshly squeezed Meyer lemon juice 3 Meyer lemons, zested 1 1/3 cups sugar 5 eggs pinch salt 6 ounces butter, cut into pats

In a bowl, combine the lemon juice, zest, sugar, eggs and salt and whisk to a homogeneous consistency. Place in saucepan and bring to a medium heat. Cook, whisking, constantly until the mixture has thickened, about 12 to 15 minutes. Remove from heat and whisk in the butter, 2 pats at a time until its incorporated and has a silky consistency. Chill thoroughly

Blackberry Sauce: 2 pints fresh blackberries, or 1 bag frozen blackberries, thawed 1/4 cup sugar Pinch salt 2 tablespoons framboise (raspberry liqueur) 1 tablespoon fresh squeezed lemon juice Place blackberries, sugar, and salt in a medium saucepan and cook until the berries are soft and the sugar has melted. Transfer to a blender and blend until smooth. Pour through a strainer into a bowl. Stir in the framboise and lemon juice. Set aside until ready to use.