I haven't had anymore problems with this. Just the first time I did it.
I have also heard about the microwave zapping out nutrients. I only heat for 15 seconds on medium heat and it's barely warm. I stir it really well and I have the color changing spoons if it's to hot.
So far she's had applesauce, pears, sweet potatoes, bananas, and green beans. She's not a huge fan of green beans yet. I have been meaning to try the avocado. Next time I'm at the store I will have to pick one up.
Oh yikes! I make my own baby food, however I just use water to think it while pureeing. I also freeze them in ice cube trays, and then I warm it up by boiling some hot water on the stove, and then letting the food in a bowl sit in the boiling water. I don't trust using microwaves because they apparently zap nutrients in the food, and can also cause heat spots.
I make yams, squash, and peas. I also feed my daughter mashed up avocado and bananas. And now that she is 5 months old I've started giving her tiny pieces of green beans to chew (she does actually chew them though, make sure that they do this and not just swallow it lol)