There's a recipe called Pasta of the Grape Harvest in The Italian Country Table that calls for something like homemade vin cotto as a sauce. I happened to stumble upon it this afternoon, and was intrigued. I have no exposure to the real stuff, but I was pleased with the results- though it did take a bit longer than anticipated. Essentially, you take chopped red grapes, wine and a few spices and boil it down until it thickens. You strain and press the grapes . Then you boil the liquid down a bit more. She suggests about 30 minutes of total boiling, but even with a slightly reduced recipe, it took longer to get what I assumed was the correct thickness. It's served with pistachios and ricotta. The cheese is listed as optional, but in my mind, it is a must. The syrup is quite sweet, so you really need the cheese to tone it down. The recipe has some wonderful remnants too. I have some syrup left for desserts and I plan to use the skins/flesh to marinade some meat this weekend. The introductory remarks confirm badthings' theory that it was used as an early sugar substitute, but notes that while "sugar sweetens, vin cotto flavors." I took a few photos. Grapes, boiling, and bowled (but before I really mixed the ricotta in).