As seen on: Giada's Holiday Handbook, Season 2, Episode 5. Christmas at Giada's.
To a jar with a tight fitting lid, add the mustard, parmesan, champagne vinegar, olive oil and salt. Screw on the top and shake vigorously to emulsify. Set aside to let the flavors marry.
In a large bowl, toss together the romaine, radicchio, basil, cucumber, avocado and pita chips. Pour the dressing over the salad, sprinkle with the salt and toss gently to coat and combine.