Tomatoes are always good for our knives. There’s nothing like a tomato to show you how dull a knife is, and the knives get sharpened more during tomato season than they do all the rest of the year. Last weekend, I sharpened my favourite tomato knife twice as I chopped 18 kilos (40 pounds) of tomatoes for pasta sauce. Then I sharpened it again the next day before slicing a tomato for lunch.

Years ago I saw a knife salesman demonstrating his wares. He cut a tomato to show how good his knives were. The knife sliced cleanly through the fruit, without squishing it, or tearing at the skin. It would have been an impressive demonstration, except that I know all about tomatoes and knives. The best knife in the world will destroy a tomato if it’s not well sharpened. The knife salesmen count on that. Their knives might be the cheapest, lousiest knives out there, but because they sharpen them before a demonstration, they’re guaranteed to cut better than any knife in the average domestic kitchen.

A well-sharpened knife is a pleasing tool (and much safer than a dull one). It’s too bad it takes a bushel of tomatoes to remind me to sharpen them.