Whisk together all vinaigrette ingredients in a small bowl until combined well.
Bring water, vinegar, sugar, and salt to a boil in a 1-quart heavy saucepan, then add onion and simmer until crisp-tender, about 3 minutes.
Drain and cool.
Spread romaine on a large platter and scatter with basil, peppers, artichokes, olives, pepperoncini, prosciutto, tomatoes, and onion.
Whisk vinaigrette again and drizzle over salad.
Finish with the shaved Parmesan cheese.
© 2015-2016 Molson Coors Canada, for more beer and food pairings, visit www.brewsandbites.ca.
What beer did you pair with this recipe? Let us know using the hashtag #CheersCanada