In a medium-sized mixing bowl, whisk together the egg and sugar until well mixed.
Add the melted butter, maple syrup,vanilla, flour, and salt and whisk until combined.
Spread pecans evenly inside a lightly buttered 10-ounce ramekin.
Pour the pie filling over the pecans and place the ramekin on a rimmed baking sheet to catch any possible spills.
Bake the pie for 30-35 minutes, or until the top is lightly browned. Remove the finished pie from the oven and place it on a wire rack to cool. The filling will continue to set as it cools.
Video
Notes
I usually allow the pie to cool for about an hour. Enjoy it warm or allow it to cool longer if you prefer.