Assemble the ingredients. Open a (12oz) bag of frozen peas and place in a colander to drain. Allow to thaw until almost completely thawed.
While the peas are thawing, cook the 4 slices of bacon until crisp, then crumble.
Cut the cheese into small cubes, just a little larger than the peas.
Prep the other ingredients. Chop the celery and red bell pepper into small pieces. Dice the onion.
Save 1 Tablespoon of the bacon back for later use. Place the peas, remaining bacon, cheese, celery, red bell pepper and onion in a large mixing bowl.
In a measuring cup, or small bowl, whisk together the mayonnaise, sour cream, vinegar, sugar, salt and pepper. Whisk together until mixture is smooth and well combined.
Pour the mayonnaise mixture over the pea and vegetable ingredients. Gently toss to coat all of the ingredients. Taste to add more salt and pepper if desired.
Transfer to a serving dish. Sprinkle reserved bacon on the top. Cover tightly and refrigerate at least 2 hours before serving.