The Slow Food movement is only picking up speed — it seems that hardly a week goes by without a celebration of heritage pigs, indigenous fruit, or other ethics-stamped edibles. Tonight’s “Fertile Ground: Celebrating Our Food Community” is something of a slow-food blowout. There will be a silent auction of “artisan foods, sought-after wines, and exciting excursions” and a meal prepared by Mas chef Galen Zamarra that features ingredients from Slow Food’s “Ark of Taste,” their endangered-foods list, including gulf shrimp and Newtown Pippin apples. (Let it be said that eating off this “endangered” list is not the same as making bald-eagle soup — these are items that will gain support and be cultivated all the more if demand rises.) The dinner will be a who’s who of the movement; shrimp-boat activist Poppy Tooker will be honored.