Cook the bacon until crisp, drain it, and crumble it when cool.
Whisk the mayonnaise, sour cream, sugar, dried dill, garlic powder, and salt until smooth.
Layer the romaine, peas, cherry tomatoes, red onion, cheddar cheese, and bacon in a clear serving bowl.
Spread the dressing evenly over the top, sealing it to the edges of the bowl.
Cover and refrigerate the salad for at least 2 hours before serving.
Toss gently at the table just before serving.