Roasted Grapes - cooking recipe

Ingredients

1 1/2 lbs red seedless grapes (black or green work well also)
2 tablespoons olive oil
1 1/2 teaspoons kosher salt
1/2 teaspoon black pepper
1/2 bunch rosemary (optional) or 1/2 bunch thyme (optional)

Preparation

Preheat oven to 425 degrees.
On a large, rimmed baking sheet, combine all ingredients, tossing with a spatula to combine. If using herbs, be sure to coat the branches with olive oil to prevent burning.
Transfer baking sheet to oven and roast, shaking pan intermittently, until grapes have burst and grape juice begins to thicken, about 30 minutes.
Let cool slightly and transfer to serving vessel.