Preheat the oven to 170°C/338°F (fan forced) . Line a 12-hole muffin pan with cupcake papers.
In a medium sized mixing bowl, mash the bananas.
Add the eggs, extra virgin olive oil, soy milk and vanilla extract to the mashed banana and whisk to combine.
To the same bowl sieve in the tapioca flour and baking powder. Add the almond flour, coconut sugar and linseed meal and stir with a wooden spoon until well combined. Add the chopped walnuts and stir through.
Evenly divide the mixture between the 12 muffin holes. Place into the oven and bake for 17 minutes or until cooked through when tested with a skewer.
Notes
Storage
Once cooled to room temperature, transfer the muffins to an airtight container and store at room temperature for 1-2 days and transfer to the fridge to store for an additional 3 days. In warmer climates, store in the fridge straight away. Freeze in an airtight container for up to 4 months.