Years ago, while in high school, I worked at McDonald's when they first came out with these wonderful creations. It has been many years and I still love to make them. I think they have changed it over the years for the dollar menu but this is the ORIGINAL recipe. Sometimes when I don't have fresh tomatoes I substitute a little salsa or some drained Rotel tomatoes.
Mrs. Walker was my Sunday school teacher and we used to do this in the church kitchen, occasionally. This is my first memory of cooking that I cherish to this day. She keeps her age a closely guarded secret but is rumoured to be 115+ years old and perhaps, immortal. She has out lived three husbands and four children. She is still sharp as the Bowie knife she carries in her purse. I don't know why she carries a Bowie knife in her purse- but she always has. I asked her about it years ago and she said, "You would be surprised how often it comes in handy, Honey." I suppose it does, Mrs. Walker. God bless you. BTW- she is thrilled that I want to pass this on to another generation of schoolchildren. She was surprised that I remembered doing this with her over 35 years ago and was touched. When asked how to do it- she rattled off the instructions faster than I could write!
I've eaten this bag-n-boil recipe for 40+ years with no toxicity what-so-ever, obviously. If it was toxic... I would be in too poor of health to type.
Google the topic for yourself and make your own judgment. The danger is greatly exaggerated.
This is my tweeked version of a recipe on this site for chocolate oatmeal#87173 .Add more milk if you like creamy oatmeal . I like very thick oatmeal .By accident I recently discovered that by omiting the oatmeal and chocolate chips , you get a great hot chocolate drink.