Balsamic-Glazed Red Onions

8 ingredients
6 steps

Ingredients

  • 2 tablespoons unsalted butter
  • 2 tablespoons extra-virgin olive oil
  • 2 large red onions, halved and thinly sliced
  • 1 cup water
  • 1/2 cup balsamic vinegar
  • 3 tablespoons sugar
  • 1 rosemary sprig
  • Kosher salt

Directions

  1. 1
    In a medium saucepan, melt the butter in the olive oil.
  2. 2
    Add the onions and cook over moderate heat until softened, about 7 minutes.
  3. 3
    Add the water, balsamic vinegar, sugar and rosemary and season with salt.
  4. 4
    Cover partially and simmer over low heat until tender, about 30 minutes.
  5. 5
    Uncover the onions and simmer until the juices are syrupy, about 15 minutes longer.
  6. 6
    Discard the rosemary and serve warm.

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