Combine blueberries, vinegar, lavender and sugar in a large pot. Bring to boil and then turn down the heat and allow to simmer for about an hour, stirring frequently.
Run the whole thing through a food mill to get a super smooth consistency and remove the lavender pieces.
Add back into the pot, bring to a boil and add pectin (you do not want to add the pectin before the food mill or you will have less pectin in your jam).
Follow instructions in the Blue Ball Book of Food Preservation for instructions to can.
I have never been a peanut butter person. My whole family likes the stuff... but I can only choke down about a Tbs a year. lol... so for me, this jam was perfect. It was perfect for accompanying my protein fast food of choice, brie. Between the brie, some pepper crackers, and the blueberry jam, I was quite a happy snacker. :)