Cook the bowtie pasta according to the package instructions until al dente.
Rinse under cold water to stop the cooking process. Let it sit until it's completely cooled.
In a large bowl, combine the cooled pasta, crumbled bacon, cherry tomatoes, chopped romaine lettuce, red onion, and chopped parsley leaves.
In a separate bowl, whisk together the Greek yogurt, buttermilk, mayonnaise, lemon juice, garlic powder, onion powder, dried dill, salt, and pepper to make the dressing.
Pour the dressing over the pasta salad ingredients and toss gently to coat evenly.
Cover the bowl with plastic wrap and refrigerate for at least 30 minutes to allow the flavors mix.
Before serving, give the salad a quick toss. Taste and adjust the seasoning if needed.
Serve chilled, garnished with extra crumbled bacon and fresh parsley if desired.