Preheat the oven to 350°F and lightly grease an 8x8-inch baking dish.
Mix the pecans, almond flour, erythritol, sea salt and melted butter until evenly moistened. Press firmly into the dish and bake for 10 to 12 minutes, until golden and fragrant. Cool completely.
Beat the cream cheese, erythritol and vanilla until smooth. In a separate bowl, whip the heavy cream to stiff peaks, then fold it into the cream cheese mixture.
Spread the cream layer over the cooled crust, going all the way to the edges to create a seal so the gelatin cannot seep underneath. Chill for 30 minutes.
Stir the gelatin into the boiling water for 2 minutes until fully dissolved, then stir in the cold water. Refrigerate for 20 to 30 minutes, until cool and just starting to thicken like syrup.
Arrange the sliced strawberries over the cream layer and gently spoon the cooled gelatin over the top.
Chill for at least 4 hours, until fully set. Slice into 16 bars and serve straight from the dish.