The Best Way to Store Leftover Canned Tomatoes or Broth

It’s a problem that has plagued me for as long as I’ve been cooking. I want to add a little canned diced tomato to a side dish or a pot of sauce, but I don’t want to add the whole damn can. So I dump the leftovers into a glass container and refrigerate it for later use. Except that by the time “later” comes, it’s been…