Cabernet and Balsamic-Caramelized Onions

Made up a batch of these flavorful onions to go on--and actually IN--some burgers we fixed the other night. But it would make a wonderful relish for roast pork or chicken, on a roast beef sandwich or even heated and used to wilt a spinach salad.

Cabernet and Balsamic-Caramelized Onions
Makes about 1 1/2 cups.

2 tablespoons olive oil
1 tablespoon butter
2 cups thinly sliced red onions
2 teaspoons dried thyme
1 teaspoon garlic pepper (or freshly ground black pepper)
1/2 teaspoon kosher salt
1/4 cup Cabernet Sauvignon
2 tablespoons balsamic vinegar

Over medium-low heat, heat olive oil and butter in a saute pan.  Add the onions, thyme, pepper and salt and cook, stirring occasionally until the onions are golden and very tender. (Low and slow is your friend here.) Add the wine and balsamic and continue to cook, until the liquid is almost completely reduced.