Ingredients

1 high-quality red wine, (750ml), or the leftovers from a few recently opened bottles 

6 small or 2 medium-large carrots, peeled and cut into 1-inch pieces 

Salt 

1 tablespoon cold unsalted butter 

Preparation

Bring wine to a boil in a large saucepan set over high heat, and lower heat to a simmer. Cook wine until syrupy and reduced to 3/4 cup, about 20 minutes.

Place carrots in a small saucepan. Cover with water, adding a pinch of salt. Cook, covered, until tender, 15 to 20 minutes. Drain, reserving the cooking liquid. Transfer the carrots to a blender or food processor, and puree, adding a bit of the cooking liquid if the mixture is too thick.

Transfer the reduced wine to a bowl, and stir about 1/2 cup of the carrot puree into it. If the sauce is too thick, add a small amount of the reserved carrot cooking water. Adjust seasoning, and whisk in butter.