Almonds, walnuts and pecans supply good amounts of fibre and minerals. Almonds also supply plenty of vitamin E, while walnuts have omega-3 fatty acids, which lower triglycerides. Peanuts, which are legumes, provide more protein than any other nut. They also supply good amounts of fibre, vitamin E and B vitamins.
Heat the oil in large heavy nonstick frying pan over moderate heat. Add the walnut halves, tossing to coat.
Add the sugar, cayenne pepper and a pinch of salt and cook, stirring constantly, for 8 minutes or until the sugar has caramelised and the nuts are well coated. Serve the walnuts hot or at room temperature.