Growing micro-greens is very easy once you have the seeds. In my Salads book, published back in 2005, I wrote quite a bit about the process. Basically, what you need do is soak a clean Chux cloth (one that's been washed and has no awful lemon or pine scent to it) and lay it, folded into 2-3 layers, on a tray, keeping it moist but not wet. Sprinkle seeds on top, quite close to each other, then let them sprout and grow to a height of about 5cm before snipping them off. When I was a child, we used to sprout seeds on top of cotton wool face wipes we'd place inside jar lids - the effect was the same. Too wet and your sprouts will rot and be useless, too dry and they'll never grow. Seeds for you to consider are peas, coriander, watercress, chives, parsley, mint and shiso.
While you're experimenting with these, you might also like to think about edible flowers which really can make a dish look spectacular. Rose, marigold, pansy, nasturtium, and comfrey are all good, just make sure you ask your seed supplier which ones are edible. Lavender is a wonderful herb in things like shortbread and panna cotta (it can be quite strong, so go easy) and also used to poke into legs of lamb as you do rosemary - but make sure you're using the edible variety. Used sparingly and for a genuinely flavoursome or visual reason, microgreens and flowers can be gorgeous.
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