There are many good prepared salsas on the market, but if you find yourself without one, this version is not only tasty but it can be whipped up from ingredients you’re likely to have in the cupboard. Served with corn chips, it makes a great snack all by itself. But don’t sell it short: it’s an extremely useful condiment to have on hand, and it’s also delicious tucked into an omelette or served alongside grilled fish.