Preparation:Remove and discard stems from silverbeet. Roughly chop the leaves. Heat oil in a large, deep frying pan over medium heat. Add garlic and walnuts. Cook for 3 to 4 minutes or until walnuts are toasted. Add silverbeet. Cook for 2 to 3 minutes or until just wilted. Add lemon rind and lemon juice. Season with salt and pepper. Toss to combine. Serve.