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["Before you do anything at all, have ready a large colander suspended over a pan and in the sink. Soften half the onion with half the olive oil in a large pan that will accommodate the mussels. Turn up the heat, pour in the wine, add the mussels, shake the pan about a bit, and put on the lid, still over a high heat. After about 2 minutes, remove the lid and shake and toss the mussels so that those initially underneath now appear on top; you will notice, from this action, that the mussels underneath have already started to open. Replace the lid, cook for a further 2 to 3 minutes and then repeat the shaking and tossing motion. Depending upon strength of heat, you may have to do this once more, but if it looks as if most of the mussels are now open, tip the whole panful into the colander in the sink. Leave to drain for at least 5 minutes, giving the colander an occasional shake to ensure that all the remaining juices drip through.", "Once the mussels are cool enough to handle, extract all the meat from their shells and collect it in a bowl. Cover and set aside. Take the mussel-cooking liquor that has now collected beneath the colander and strain it through a very fine sieve into the stock. Pour this mixture into a pan and place over very low heat to keep hot, but not to boil. (You may not necessarily use all of this; any leftover can, of course, be frozen for a subsequent occasion.)", "In an entirely new solid-bottom pot, heat the remaining olive oil. Soften the remaining onion in this and then add the tomatoes. Briskly cook together for a few minutes until reduced to a sloppy paste. Add the rice and stir around in the tomato mess until thoroughly coated with it. Introduce the first ladle of the hot stock and vigorously stir in. Only consider adding a second ladle once this has been fully absorbed. And so on, until the rice is nearly cooked; taste a grain: it should still possess ""bite.""
