01 - Place bacon slices in a large skillet over medium heat. Cook for 8 to 10 minutes, turning occasionally, until bacon reaches desired crispiness. Remove from skillet and transfer to a paper towel-lined plate to drain excess grease. Allow to cool completely before crumbling into bite-sized pieces.
02 - In a large salad bowl, combine chopped romaine lettuce, halved cherry tomatoes, diced avocado, and thinly sliced red onion. Toss ingredients gently to distribute evenly.
03 - In a small mixing bowl, add mayonnaise, sour cream, Dijon mustard, apple cider vinegar, and fresh lemon juice. Whisk vigorously until mixture is completely smooth and well combined. Season with salt and black pepper to taste, whisking again to incorporate.
04 - Add crumbled bacon pieces to the salad bowl with prepared vegetables. Drizzle the creamy dressing evenly over the salad. Using salad tongs or large spoons, toss gently to coat all ingredients with dressing without bruising the lettuce.
05 - Sprinkle chopped fresh chives over the top of the salad as a finishing garnish. Serve immediately while bacon remains crispy and vegetables are at their freshest. For optimal presentation, serve chilled or at room temperature.