On a rainy Thursday afternoon, as workers in a Petaluma warehouse filled a few hundred cardboard boxes with bunches of crisp rainbow chard, snowy white turnips and freshly harvested oranges ...

And there are plenty of choices, from the easiest vegetables to grow, like lettuce, to unusual varieties that are trickier to find on the shelves, like rainbow chard. A single packet of seeds ...

The rainbow chard can be substituted with silverbeet or try combining with spinach, curly kale or cavolo nero. If using cavolo nero remember to pull away its central stem as it can be coarse.