For the Simple No-Bake Crust:
1. Lightly grease a 9-inch tart pan to ensure easy removal later.
2. In a medium bowl, whisk together the almond flour, cocoa powder, and powdered keto sweetener until well combined and lump-free.
3. Stir in the melted butter until the mixture clumps together, resembling moist crumbs.
4. Press this mixture firmly and evenly into the bottom and up the sides of your prepared pan. Pop it into the fridge to chill while you prepare the filling.
For the Creamy Raspberry Mousse:
1. Puree the raspberries in a blender until very smooth, then pass the puree through a fine-mesh sieve into a bowl to remove all seeds, leaving you with a silky, vibrant liquid.
2. Transfer this strained raspberry puree to a medium saucepan and stir in the fresh lemon juice.
3. Sprinkle the gelatin evenly over the surface of the puree and let it sit for about 5 minutes to soften.
4. Place the saucepan over medium-low heat and whisk gently until the gelatin is completely dissolved and the mixture is smooth. Remove from heat and allow it to cool down completely.
5. In a separate, chilled bowl, whip the heavy cream with the powdered keto sweetener until it forms beautiful, stiff peaks.
6. Set aside about 1/2 cup of the whipped cream for decorating your tart later.
7. Gently fold the cooled raspberry puree into the remaining whipped cream. Mix carefully until there are no streaks and you have a lovely, uniform pink mousse. This gentle folding keeps the mousse light and airy!
8. Pour the prepared mousse into your chilled tart crust and return it to the refrigerator. Let it chill for at least 3 hours, or until it's perfectly set and firm enough to slice.
To Garnish (Optional):
1. Once your tart is set, pipe or spread the reserved whipped cream decoratively around the edges or over the center.
2. Top with extra fresh raspberries for a beautiful finish and a burst of fresh flavor. Enjoy your stunning, healthy, and easy-to-make dessert!