In the bowl of a food processor, add mayonnaise, sour cream, lemon juice and zest, and herbs. Pulse until smooth. Refrigerate until you are ready to use.
Layer your salad in a trifle dish. Start with the beets on the bottom in an even layer. Next add a layer of each lettuce, celery, blue cheese, and peas. Spread the dressing over the top of the salad and season with pepper to taste. Top with bacon. Serve immediately or refrigerate until ready to serve.