When handling chiles I recommend wearing gloves to avoid getting the burning oils they can release on your skin. The size of your tamales and yield will depend on the size of your corn husks. If the husks are large use more masa and filling. If the husks feel too fragile or small, layer two husks on top of each other. If you want to make these vegetarian, replace the manteca with chilled shortening and use vegetable broth instead of chicken broth.