Often times at the auction if produce goes extremely cheap we will buy it for that simple reason. This then forces us to figure out how to use it. In this case it was 6 qts of Concord grapes that sold for no more than 25 cents a quart. So the kids and I googled a simple recipe (gotta love the internet) and spent and hour making grape juice.
Step 1: Pull all of the stems off of the grapes.
Step 2: Wash all of the grapes with water.
Step 3: Drain the water off of the grapes.
Step 4: Mash the grapes (we used a food processor).
Step 5: Simmer mashed grapes on low for 15 minutes.
Step 6: Strain the mashed, cooked blueberries through cheesecloth over a large pot for several hours to overnight.
Step 7: You now have 100% grape juice concentrate that is the thickness of milk. Refrigerate it and drink it as concentrate or dilute it (which will make it more like store bought) with water. Excellent!