Green-Tomato Jam

Directions

1. 1
   Spread half of the tomatoes in a large saucepan.
2. 2
   Cover with 2/3 cup of sugar, the lemon slices and another 2/3 cup of sugar.
3. 3
   Spread the remaining half of the tomatoes and 2/3 cup of sugar on top.
4. 4
   Let stand without stirring until most of the sugar has dissolved, about 1 hour.
5. 5
   Stir the tomatoes.
6. 6
   Bring to a boil over moderate heat, stirring frequently.
7. 7
   Reduce the heat to moderately low and cook, stirring occasionally, until the jam cooks down to 3 cups, about 1 hour.
8. 8
   Let cool, then discard the lemon slices.