Cook pasta according to package directions, omitting salt.
Drain, reserving 1 cup cooking water.
Stir in the buttermilk dressing until thoroughly combined.
Stir in additional cooking water as needed for a creamy consistency.
Cover and chill for at least 30 minutes or up to 2 days.
Just before serving, stir in lettuce; sprinkle with the remaining 1/4 cup Parmesan.
Tips
To make ahead: Prepare through Step 3 and refrigerate for up to 2 days.
- Daily Values (DVs) are the recommended amounts of nutrients to consume each day.
(-) Information is not currently available for this nutrient.
