Tomato Jam - cooking recipe

Ingredients

2 1/2 lb. ripe tomatoes
1 tsp. grated lemon peel
1/4 c. lemon juice
1/4 tsp. salt
1 Tbsp. mixed pickling spices
5 c. sugar
1 1/3 bottles Certo

Preparation

Peel, core and cut tomatoes into 1 1/2-inch pieces and put into a large saucepan.
Add lemon peel, juice and salt.
Tie spices in cheesecloth bag and add.
Stir in sugar; boil.
Add Certo and bring to a rolling boil for 1 minute.
Stir constantly. Remove from heat.
Let stand for 5 minutes and put into hot, sterilized jars.