It’s the aroma that hits you first as you walk through the door at Back Porch Market. Owners Debra Hynson and Bryan Frost say people comment daily on the savory scents emanating from their open kitchen. To those who thought they’d traded gourmet specialty food for small-town charm, guess again. The small shop on Colfax Avenue in Grass Valley carries hard-to-find high quality, artisan-produced meats, cheeses and carefully selected wines, not to mention meals created from scratch for those not in the mood for cooking. On Thursday, kitchen assistant Ben Avansino was preparing fresh eggplant rollatini, one of the many …