By Bryan Calandrelli, Niagara Regional Editor What’s this area known for? What’s your specialty? Which white do you do best? These are all questions that I get asked when pouring local wine for newcomers to the Niagara region. I don’t always have time to explain the diversity of soils or the huge difference in how Lake Ontario moderates one mile from the lakeshore to six miles inland to the Escarpment. Nonetheless, people seem to want an answer as to what our signature white grape variety is or will be.  It's not an easy question to answer. In the Finger Lakes,…