Adjust an oven rack to the middle position and preheat the oven to 350F.

Put the grape bunches in a single layer on a baking sheet and roast them for 45 minutes to 1 hour 15 minutes, until the skins are blistered and the grapes look like they are one-third of the way to becoming raisins.

The time varies depending on the size and variety of grapes you use. If you're roasting more than one variety of grapes, keep them separated on the baking sheet so you can remove each variety as it's done. remove the grapes from the oven and carefully take the grapes from the baking sheet and lay them out on a pretty cutting board or platter.

Serve on their own, with fresh ricotta, with honey, or with a selection of other cheeses as well.