Par-bake your favorite pie crust (either homemade or purchased) in a 350-degree oven for about 20 minutes or until it just barely starts to brown. Beat eggs on medium speed of electric mixer for about 30 seconds, until foamy. Add all syrups, salt, and vanilla and beat for about 1 minute on medium speed until well-combined. Add melted butter and flour. Place pecans in the par-baked pie crust and pour mixture over pecans. Bake at 350 degrees for 50 to 55 minutes.