Freeze the tofu for 24 hours, I will tell you a really KICK ass recipe tonight for it. I have to dig up my notes..
Small amounts of peanut butter shouldnt bother you. The problem people with ulcers have with peanut butter is that they eat several tablespoons. That stops up even people with normal GI tracts
But if it isnt something you are not comfortable with, find a liquid protien supplement. A soy based protien drink would be comfortable for your stomach and not too sweet.
You can sweeten your tea and get health benefits by using local honey or organic maple syrup.
I prefer the maple syrup, but that is because I LOVE sweet stuff...
It will take me a little while but I will dig up my herb encyclopedias and post some herbs that will help your specific problems that you can make good tasting teas with. You can drink the teas and count that as your water intake as well . It seems easier to drink the amounts of water you need every day if it has a varied taste pallet.
Do you have an herbal store near by?
Or an organic based grocery store like Whole Foods?
http://www.wholefoodsmarket.com/