If you wish you may add a) vegetables, b) mushrooms, c) minced chicken, d) seafood, chunks or pureed in a little stock, or some combination of these, plus perhaps some good oil-cured pitted black olives or rinsed capers, if you are fond of them. Add them at just about the time that the risotto is in its final state, leaving sufficient time for ingredients to heat through. You may soak the barley the day before, then seal in an air-tight container till cooking. Or you may freeze it in this container,+ defrost and then cook.