Taking from an Existing Flame

My Dear Haham, I was intrigued by your reply to a recent question regarding use of digital stove top settings on yom tob. Your reply was as follows: “That whole concept of only taking from an existing flame is completely misunderstood. I can elaborate at a later...

“Ingredient Kosher” for Vegans

If I’m looking at a vegan product for year-round, what are the potentially-problematic ingredients to look out for? I presume vinegar, but anything else? I want to be able to decide for myself and know what to look for rather than post here every time I see...