Sorrel is one of the most popular herbs I use, but it's a love-it-or-hate-it kind of taste. The first time I tried it, it reminded me of crab apples - sour and tangy.
Uses: It makes for a really good lemon alternative in savoury dishes. Lovely in a potato salad, or in Russian borshch soup.
Caution: Sorrel is fairly high in oxalic acid, so you would never eat a lot at once. For a family meal, I would pick up to four small leaves.
Plant sales: All plant sales are from the Blue Borage garden in Titirangi. You'll need to order and prepay, and decide on a day for picking up your plants. I'll send the address once the order is completed. (I'm half-way between Titirangi and Laingholm) There's a lot here, and I can put together bundles of plants for $50 and upwards over a video call. I recommend you bring a cardboard box and handle your plant pots with gardening gloves. As with all gardening, you'll want to wash your hands with soap and water frequently.