Make this recipe a recipe that people in that category can eat. categories: ['low_sodium'], recipe: heat the olive oil in a large pan over medium heat. add the red onions. do not stir. let the onions turn light brown, then turn and brown on the other side. when the onions are browned, add the balsamic vinegar and orange rind. cook for 2-3 minutes, until the liquid is almost gone.

Target recipe: melt the butter in a medium heavy-based saucepan. add sugar. stir over low heat until dissolved. add onions and cook. cover and continue to cook on low heat for 30 minutes. add garlic and balsamic vinegar. season and cook uncovered on low heat for another 30 minutes. stir every few minutes. once cooked, transfer to a bowl. cool slightly before serving.