Halaal food mixed with haraam
Question

                Asalamu Alaikum,
, by Allah's (swt) Grace and Mercy I have recently begun 
practicing Islam, may Allah bless you for establishing a light on the 
Internet when there is so much darkness and evil present on it.
I am a little confused about what foods are haram/halal. What to do when 
'people of the book' offer meat (besides pork) to us? 
Also, I have heard that certain ingredients in food may be derived from 
animals, such as mono- and diglycerides, lecithin, gelatin, etc. Are these 
permissible to eat?
As well, I have heard certain chocolate bars have trace amounts of alcohol 
in them. But they are so small that there is no way of being even slightly 
intoxicated from them.
Please clarify these issues, Allah-willing.
Jazak-Allah
Praise be to Allah.Who has guided you to follow His laws and religion. 
  We ask Allaah to give you and us even more of His Bounty.
  In response to your question, there is nothing wrong with eating any halaal 
  food offered to us by the People of the Book, so long as it is not mixed with 
  haraam like pork and so on. As regards sweets that contain unchanged alcohol, 
  we are not permitted to eat them, whether the alcohol in them is in big amounts 
  or only a little. The answer to the remainder of your question may be found 
  under question #210 . 
  And Allaah is the Source of help.