Silverbeet and Rainbow Chard will last up to 5 days in the crisper in your fridge. Maximise freshness by placing it in a reused plastic bag or large sealed container. There is no need to wash it until you are ready to prepare and eat it.
There are so many ways you can eat rainbow chard or silverbeet! You can eat it the same way as you would eat spinach. This includes eating it raw in a salads sandwiches, wraps, or blended in a smoothie. More often though, it is eaten cooked and it can be braised, boiled, or sautéed, added to soups, frittatas, pies, quiches, pastas, gratins, casseroles, or a huge range of other dishes. For a simple dish, try sautéing the leaves and stems with garlic and olive oil and serving with a squeeze of lemon juice and some steamed fish or a poached egg or just on its own.
See the recipes below for some inspiration.