It's better to "苹果还是煮过再给娃娃吃". Also, I read on the internet that it's better to buy jar food for some particular fruits/vegetable (maybe carrots? - let's assume it carrots). Ordinary carrots can contain high levels of a bad element (my memory is so poor that I'm glad I don't need to pass any test in the near future), while infant jar food are carefully monitored, so this bad element will be at a low level.