Dice red onion and prepare the bacon, cooking and chopping it into small pieces.
Rinse your peas in cold water and drain.
Fill a large bowl with cheddar cheese, red onion, mayonnaise, bacon bits, peas, salt and pepper. Mix everything together, and chill for an hour or more before serving.
Notes
You can make this even easier by buying crumbled bacon instead of cooking and chopping your own!