Preheat the oven to 180c/350f.
Add all of the dry ingredients and the water to a large bowl and mix together with a whisk to remove any lumps.
Add the veggies & cheese and stir to combine.
Evenly distribute across muffin liners or a tray.
Place in the preheated oven and cook for 25-30 minutes until a skewer comes out clean. These will continue to firm up as they cool.
Leave in the liners for 10-15 minutes before removing (so they don’t stick to the liners) and leave to cool on a cooling rack if you aren't eating them straight away.
Store in the fridge for 5 days or freeze for up to 3 months.