In a trifle bowl or large clear glass bowl, layer the lettuce along the bottom. Add the tomatoes, peas, eggs, and green onions in individual layers over the lettuce. In a medium bowl, mix together the mayonnaise, sour cream, sugar, and salt and pepper. Spread over top of salad. Sprinkle cheddar cheese and then crumbled bacon over the top of the sour cream dressing. Cover with plastic wrap and chill in refrigerator for up to 2 days. Serve, and enjoy!