Prepare a vegan pie crust (no need to pre-bake) and chill it in the refrigerator until ready to use. Preheat the oven to 350 degrees F.
Make flax eggs: In a small bowl, mix ground flaxseeds and water, then set aside to thicken.
In a large bowl, combine melted vegan butter, corn syrup, flax eggs, sugar, cornstarch, vanilla, and optional bourbon. Whisk until smooth.
Roughly chop pecans, leaving some whole for decorating. Spread them evenly into the unbaked pie crust.
Pour the sugar mixture over the pecans in the pie crust.
Bake for 60-65 minutes until thick, bubbly, and dark brown. Don't cut into it immediately; it will still be liquidy until it cools. Use a pie crust shield if needed.
After baking, sprinkle with coarse salt if desired, and let it cool on a wire rack. Allow the pie to cool at room temperature for 30 minutes, then refrigerate for at least 3 hours (overnight is even better).
Slice and serve with coconut whipped cream if desired. Enjoy!