I rarely buy cans of tomato paste because usually all I want is a little bit and I don’t know what to do with the rest. In London, I was able regularly to find tubes of tomato paste, which were convenient because I could squeeze out just a little at a time — however much I needed for a particular recipe. If they make that here in the States, I haven’t found it.
But I just read a clever tip that solves the issue of the cans. In “The Big Book of Casseroles,” author Maryana Vollstedt recommends freezing tablespoonfuls of tomato paste separately on a piece of foil in the freezer, and when they’re frozen, putting them in a bag for use later. I love it. Now I can get those cans and make full use of them.