Micro- or baby herbs and cress, growing in punnets, are available at some greengrocers and online. They add both colour and flavour to dishes. Snip as many leaves as you need into a bowl of cold water โ the herbs will float, and any soil or debris will sink โ then skim off the herbs and drain on a clean tea towel. The remainder of the punnet will keep, loosely covered with a damp cloth and refrigerated, for several days; if micro-herbs are unavailable, use the smallest leaves on a bunch of the regular-sized herb or tear larger leaves into small pieces.