The friendliest place on the web for anyone with an interest in aquariums or fish keeping!
If you have answers, please help by responding to the unanswered posts.
I blanch zucchini for our fish, shrimps, and crayfish. I buy the bagged frozen stuff, take out a few slices, drop it in boiling water for 1-2 minutes, drain then let it cool in a cup of dechlorinated water. For the fish and shrimp I just drop it in the tank, for the crayfish I use my tongs to feed them. Darn little things like to hold fingers with their claws and pull the food to their mouths, that friggin hurts!
I think you can boil them or nuke them. I think if you do the peas you have to take the shell off of them before feeding. I also read of people using veggie clips to feed the fish as well.