Preheat oven to 160 degrees and line a slice tray with baking paper. In a small bowl combine the chia seeds with the water and let it sit for 5 minutes until a gel like texture is formed. In a medium size pot melt the coconut oil and maple syrup or honey and stir until combined. Add the chia seed mixture, the rest of the ingredients and combine with a wooden spoon. Place the mixture into the lined slice tin and press it down firmly with the back of a glass. The firmer you press the mixture, the less chance you will have of it crumbling once cooked.. Place into the oven and bake for 50 minutes until golden. Remove from oven and let it sit until completely cool. Place in the freezer for 15 minutes then using a sharp knife cut into squares. Drizzle with melted dark chocolate if you wish. Store in an airtight container.