INGREDIENTS

  • 2 tablespoons olive oil
  • 4 large onions (about 10 cups), thinly sliced
  • 3 tablespoons balsamic vinegar
  • 2 tablespoons brown sugar
  • 1 1/2 teaspoons fresh rosemary , finely chopped
  • 1/4 teaspoon kosher salt
  • 1/4 teaspoon freshly ground black pepper

INGREDIENTS

  1. Preheat oil in a large skillet over medium heat. Add onions. Cook, stirring occasionally, until onions are soft, translucent, and just beginning to brown, about 20 minutes.
  2. Stir in balsamic vinegar, brown sugar, rosemary, and salt and pepper. Continue to cook, stirring occasionally, until liquid is evaporated and onions are dark brown and reduced to 3/4 cup, about 40 minutes more.
  3. Remove from heat and let cool. Store in a glass jar or airtight container in the refrigerator for up to 1 week.
  • Yield: 3/4 cup
  • Prep: 60 mins
  • Cuisine: American
  • Course: Condiment