Yeap, ketchup is a no-no, at least for induction. I wouldn't do ketchup or tomatoes for a while. When you get into the latter phases, then you can start doing small amounts of that kinda stuff. I ain't really something you are going to miss very much in a while.

Make sure to mix it up some with some grills steaks, pork, fish, tuna, that kinda thing. Gotta run, taking the kid to the fair.

Later,
wsgts