1Preheat your oven to 175°C (350°F). Prepare a baking sheet with parchment paper.
In a bowl, mix together almond flour and icing sugar. Cut the butter into small pieces and rub into the almond mixture until it resembles coarse crumbs.
Press the mixture onto the baking sheet, forming a thin layer for the base of the entremet. Bake for about 15 minutes or until golden brown. Allow to cool.
In a small bowl, sprinkle gelatin over 100ml of water and let it bloom for about 5 minutes.
In a saucepan, combine lemon zest, lemon juice, grated ginger, and sugar. Cook over medium heat until the sugar dissolves.
In a separate bowl, beat the eggs. Gradually pour the hot lemon mixture into the eggs, whisking constantly to temper them.
Return the mixture to the saucepan and cook over low heat, stirring constantly until it thickens enough to coat the back of a spoon.
Remove from heat and stir in the bloomed gelatin until fully dissolved.
In a mixing bowl, whip the heavy cream to soft peaks. Gently fold the whipped cream into the lemon-ginger mixture until well combined.
Pour the mousse over the cooled almond base and refrigerate until set, at least 4 hours or overnight.
Once set, remove the entremet from the refrigerator and, using a hot knife, cut into desired shapes.
Serve chilled and enjoy your Ginger Lemon Mousse Entremet.