Chop the onion and washed mushrooms and fry these shortly in a little oil until the onion begins to soften and become translucent.
Drain the red kidney beans and add them to a blender alongside the rest of the ingredients & the onion.mushroom mix. Alternatively you can add everything to a bowl and puree with a stick blender (this is my preferred option to be honest)
Fold the flour into the mixture and with your oiled hands create the 'meatballs'
For the low-calorie option add the balls to an ovenproof dish and bake at 200ºC for about 20 minutes. Alternatively, heat a little oil in your pan and fry the 'meatballs' in your pan. I would advise using a pan with a lid for this, as the oil can splash during the frying period.
These 'meatballs' are great on a sandwich but also amazingly paired with Spaghetti & tomato sauce - like I did in the image above. But most importantly: enjoy!