- 4 ounces unsalted butter
- 2 pounds yellow onions, peeled and very thinly sliced
- 2 teaspoons chopped fresh thyme leaves
- In a large skillet or saute pan, melt the butter over medium high heat. Add the onions and lower the heat to medium-low. Cook slowly, stirring occasionally, until golden brown and caramelized, 45 minutes to 1 hour. Add the thyme and salt to taste, and stir. Remove from the heat and keep warm until ready to serve.