Step 1: Cook the Bacon : Place bacon strips in a cold skillet and heat over medium. Cook until crispy, about 8–10 minutes, flipping occasionally. Transfer to a paper towel-lined plate to drain excess fat. Once cool, crumble or chop into bite-sized pieces.
Step 2: Prepare the Buttermilk Ranch Dressing : In a medium bowl, combine mayonnaise, sour cream, and buttermilk. Whisk until smooth. Add lemon juice, garlic, Dijon mustard, chives, dill, parsley, salt, and pepper. Stir well and adjust seasoning to taste. Chill in the refrigerator for 15 minutes before serving (this enhances flavor).
Step 3: Prepare the Salad Ingredients : Wash and chop lettuce. Halve cherry tomatoes. Dice avocado and toss with a squeeze of lemon juice to prevent browning.
Step 4: Assemble the Salad : In a large salad bowl, layer the lettuce first. Add tomatoes, bacon, avocado, and croutons. Season lightly with salt and pepper.
Step 5: Dress and Toss : Drizzle with chilled buttermilk ranch dressing. Gently toss to coat the ingredients evenly, or serve the dressing on the side.