Pre heat oven to 190/170fan/Gas 4, line a baking sheet with parchment paper or a silicone baking mat.
In a medium frying pan, heat 2 tbsp coconut oil over a medium -low heat, add the onion to the pan.
Cover for 10 minutes then uncover and cook for a further 10 minutes until they are dark brown.
In a large bowl, combine the coconut flour, almond flour, tapioca flour, baking powder and salt & pepper.
In a smaller bowl whisk the eggs, and 4 tbsp melted coconut oil. Add the wet ingredients to the dry and whisk until smooth. Allow to reset for 5 minutes.
Stir in the olives, onions, thyme and nutritional yest. Take large spoonfuls of the mixture and place on to the baking sheet.
Bake for 15-20 minutes or until golden brown. Makes around 12-14 biscuits.