Prep Time: 20
Cook Time: None
Serves: Serves: 4
In a medium bowl, whisk together sour cream and buttermilk. Whisk in mayonnaise, jalapeño pepper, garlic salt and pepper. Chill at least 30 minutes.
In a large bowl, combine lettuce, tomatoes, avocado and 1 cup cheese. Add 1/3 cup of the dressing; toss well. Add more dressing if needed; toss again. Transfer to 4 serving plates; top with remaining cheese. Refrigerate remaining dressing up to 4 days.