1 tbsp olive oil
2-3 large, red onions, halved and thinly sliced
1/8 cup balsamic vinegar
3 tbsp white sugar
salt and pepper, to taste
Mix sliced onions together with sugar and vinegar. In a large skillet, heat oil over medium-low heat. Add onion mixture; cook for 10-12 minutes or until onions are tender, stirring occasionally. All liquid should have evaporated and onions may start to turn golden. Stir in salt and pepper.