Preheat oven to 350 degrees F.
Lightly but adequately grease a muffin tin with oil and set aside.
Sift together the flour, baking powder, and baking soda in a large mixing bowl. Add chopped pecans and stir to mix.
Combine bananas, sugar, chia egg, and melted vegan butter in another large bowl. Stir until well combined.
Fold flour into the banana mixture, and mix until just blended. Do not over mix.
Spoon batter into muffin pans, filling each 3/4 full. Bake for 25 to 30 minutes or until muffins are risen, brown and springy to the touch. Test with a tester in the centre of a muffin. If it comes out clean, remove muffins from oven.
Remove muffins from tin onto a baking rack and let cool.