- 1 tablespoon canola oil
- 4 cups minced onion
- ½ teaspoon salt
- 1 tablespoon balsamic vinegar
- 3 tablespoons fresh lemon juice
- 1 tablespoon sugar
- 1 tablespoon chopped lemon zest
- Place a medium to large skillet over medium heat and wait about 2 minutes. Add the oil and swirl to coat the pan. Add the onion, sauté for 5 minutes, then cover the pan and lower the heat.
- Cook, covered, for 15 minutes, stirring once or twice during this time. Stir in the salt and vinegar. Cover and cook for another 5 minutes. Stir in the lemon juice and sugar and cook, uncovered, for about 5 more minutes.
- Remove from the heat, and stir in the lemon zest. Cool to room temperature, then pack into a tightly capped jar. Cover and refrigerate for up to 3 weeks. Serve cold or at room temperature.