If all goes according to plan, Lazy Dog Chocolateria will be open mid-October at 111 Mill St. in downtown Grass Valley. The location will present owners Bob and Deb Peterson’s return a storefront after years of mobile vending. In the 1980s, the couple ran Confectionately Yours in Nevada City, before taking their popular treats on the road — under the moniker Lazy Dog Ice Cream — in their signature modified pink classic Chevrolet truck. Since then, the Peterson’s frozen concoctions have become renowned, garnering lines at events like the Willie Nelson concert, Music in the Mountains’ Summer Fest and, most …