- 1 tablespoon butter
- 1/4 cup olive oil
- 1 1/4 pounds onions, thinly sliced
- 1 tablespoon chopped fresh rosemary
- 1/2 teaspoon fine sea salt
- 3 tablespoons pine nuts, toasted
- Melt butter with oil in heavy large skillet over medium-high heat. Add onions; sauté until tender, about 5 minutes. Reduce heat to low; mix in rosemary and salt. Sauté until onions are golden, about 30 minutes. Season with pepper. Cover and chill up to 3 days. Stir in pine nuts before using.