Preheat oven to 325 degrees F.
In a large bowl, beat eggs well using an electric mixer.
Add maple syrup and brown sugar, beat until well combined and a little frothy.
Add the last three ingredients (vanilla, butter, pecans) and mix until well combined.
Pour into pie shell.
Add extra whole or crushed pecans to the top of the pie in any design or random pattern you like.
If using an egg wash, lightly brush edge or rim of pie crust with the beaten egg.
Bake for 45 minutes, checking at 35 minutes to make sure pecans not burning. If pecan's are starting to brown too much, cover with foil for the last 10 minutes.
Let Cool and serve room temperature.
Stays well in the refrigerator for several days.