Elegant Oven Strawberry Jam

8 c. halved or quartered strawberries
4 c. sugar
1/4 c. balsamic vinegar or lemon juice

Combine berries and sugar in a very large saucepan. Let stand for 2 hours, stirring several times. Add vinegar and bring to a boil over high heat; reduce heat and boil gently, uncovered, for 10 minutes. Pour into 2 9x13 inch glass dishes and put in oven at 150*. Bake until mixture is thickened and will form a gel, about 3 hours for convection, and 10 hours for standard, stirring occasionally. Ladle into sterilized jars and process for 30 minutes.

Yield: about 4 cups