In a colander, rinse frozen peas under hot water for 3-4 minutes (keeping the peas crunchy).
In a large bowl combine peas, diced onion, cubed cheddar cheese, roughly chopped hard boiled eggs and mayonaise. Stir with wooden spoon gently to combine and chill for at least an hour. Just before serving sprinkle with salt and pepper to taste.
Serve as a side dish or for a refreshing salad for lunch or dinner!