Simmer for 15 minutes.
Add tomatoes and cook gently until tomatoes become clear.
Cover and let stand overnight, in a cool place.
Pack tomato pieces and lemon into hot sterile jars, leaving 1/2 inch headspace.
Remove spice bag from remaining liquid (syrup) and boil for 2 to 4 more minutes.
Pour hot mixture over tomatoes.
Wipe jar rims with hot cloth to allow for proper sealing.