Wash the tomatoes and cut into wedges. In a stainless bowl, sprinkle with the sugar in layers and let sit overnight. Bring to a boil in a heavy bottomed pan the next day, and then reduce the heat to a simmer for 1 hour. Add the sliced lemon and cook an additional 1 hour, over low heat. Cool and use or can according to USDA guidelines.
Note: This recipe was provided by professional chefs and has been scaled down from a bulk recipe provided by a restaurant. The FN chefs have not tested this recipe, in the proportions indicated, and therefore, we cannot make any representation as to the results.