Step 1

Wash all produce before cooking.

Step 2

Coarsely chop green tomatoes and stem blueberries.

Step 3

Pulse blueberries and tomato in a blender or food processor until mixture is smooth.

Step 4

Cook blueberry mixture, 1 cup water, and sugar in a Dutch oven over medium heat, stirring constantly, until sugar dissolves.

Step 5

Add remaining ingredients. Bring to a boil; cook, stirring constantly, until mixture thickens.

Step 6

Pour hot mixture into hot jars, filling to 1/4 inch from the top. Remove air bubbles; wipe jar rims. Cover at once with metal lids, and screw on bands.

Step 7

Process in boiling water; bathe for 10 minutes.