Prepare the salad dressing by combining the mayonnaise, sour cream, and ranch dressing mix. Set aside.
In a small bowl combine the cut large tomatoes, green onions, and bell peppers.
In a glass bowl or trifle dish add half of the cornbread. Top with half of the kidney beans, cheddar cheese, bacon, and tomato mixture. Spoon half of the salad dressing mix. Repeat the layering and garnish with cut green onions. Cover and refrigerate for at least two hours for flavors to meld.