1. Drain off the liquid from the kidney beans, then rinse the beans thoroughly under cold running water.
2. Cook the frozen peas and beans according to directions on the packet. Drain and cool slightly.
3. Mix together the beans, peas, red and green peppers, spring onions and chopped parsley in a bowl.
4. Flavour with a pinch of salt and your favourite salt-free seasonings and herbs. Add a drizzle of lemon or lime juice if you prefer.