Make the pie crust. Begin by mixing almond flour, flax meal, and a pinch of sea salt in a bowl. Add softened butter (or ghee or coconut oil) and an egg, mixing until a thick dough forms. Place the dough between two sheets of cling film and roll it out. Then, fit the dough into your pie pan, pressing it down and up the sides to form the edge.
Freeze the crust for at least 30 minutes. This helps it hold its shape during baking.
To make the filling, melt the butter in the microwave or on the stove. In a separate bowl, whisk together eggs, melted butter, granulated and brown sugar substitutes, rum, vanilla extract, and sea salt. Stir in the chopped pecans.
Remove the crust from the freezer. Pour the pecan filling into the crust, spreading it evenly.
Preheat the oven to
350 °F (175 °C), or
380 °F (195 °C). Bake the pie for 40 to 45 minutes, or until the filling is set but still slightly wobbly in the center. Let the pie cool to room temperature before slicing. This ensures the perfect texture and flavor.