Preheat the oven to 350.
Soak ground flaxseed in the coconut oil in a small bowl.
Mix melted margarine, pumpkin, and vanilla together
Stir in sugar, Truvia, and the ground flaxseed with the coconut oil until everything is mixed together well.
Mix remaining dry ingredients together (except pecans) and slowly stir into the rest of the mixture.
Once everything is mixed together, gently stir in the pecans.
Spoon into pie crust and bake at 350 for 25-30 minutes.