Bellwether Wine Cellars opened its doors today, offering tastes of its 2011 Sawmill Creek Vineyard Pinot Noir and three distinct rieslings. I got to taste all three — two dry, one semi-dry; one fermented with ambient yesasts, two not — and will write about all of them over the next few days. But today, we focus on the Bellwether Wine Cellars 2012 Sawmill Creek Vineyard Riesling ($22), which is likely to be the crowd-pleaser of the riesling lineup. Peach and green apple aromas are joined by a squirt of lime, honey and a bit of apple blossom on a pleasant,…