"(1) How much water do I put into the slow cooker to cook the porridge? Any guidelines you know of? Can I cook the porridge overnight? And once the porridge starts to cook can I throw in the fish and vege to cook it overnight?"
I have never used a slow cooker to cook porridge before, but since slow cooker hardly 'burn' the food, you can put a ratio of 1:4. Meaning, if you put 1 cup of rice, you can put 4 cups of water.
Sure you can put in the 'main stuff' in once the porridge starts to cook, but to cook overnight....hmmm... I guess with slow cooker, you can....
"(2) I bought the tiger brand food jar to store the porridge but I'm wondering if it is good to put 2 meals worth inside (for lunch and dinner). Will the porridge go bad? Especially if I intend to cook the porridge with "Ngor Heer" I'm not sure if the fish will turn fishy... Any one can share their experience?"
Seriously, my experience with porridge in air-tight container, hmmm... not too good. The porridge do turn bad after many hours... if you pack it in the morning, lunch should be fine. But I dare not say so for dinner, unless you instruct the care-takers to open the lid slightly, at least got 'ventilation'. As to whether it will turn fishy, most importantly is the cooking part, throw in ginger, a slice or two .... that should be good enough to get rid of the fishy smell.
*just my 2 cents.... *smile*