Combine chia seeds with water in a bowl and then leave the mixture to thicken for 5 minutes in the fridge.
Meanwhile, blitz the mushrooms in a food processor into small bits.
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Transfer the minced mushrooms into a bowl and tip in parsley, chillies, and lime zest. Then, add the chia egg, rice flour, and one tablespoon of oil.
Work the mixture into a dough and then shape the meatballs. Transfer them onto a baking tray and brush them with the remaining oil.
Finally, bake the meatballs at 200°C (390°F) for 25 minutes or until lightly browned and crispy.