Fry Onions and corn Kernels in Pan til soft,add salt and pepper and some Cayennne Pepper. You can add the potato seperate or add them to the onion and corn. I cooked the potatoes on there own once the onion and corn was cooked.
In a bowl add the eggs flour,corn & Onion,Milk and flour,grated cheese and more salt and pepper if you think its lacking add parsley,mix til combined.
Pour the mix into Slow Cooker. I am cooking mine for 1-2 hrs on high but I will keep checking it as I have a 6.5litre Slow Cooker. You can add extra cheese on top after it has firmed up maybe in the middle of cooking process.