Make the candied pecans: Combine brown sugar, butter, corn syrup and salt in a large skillet. Stir over medium heat until butter is melted. Add pecans and cook, stirring constantly, for 5-7 minutes. Make sure pecans are all coated evenly. Spread pecans in single layer on parchment paper and cool completely.
In a small bowl, whisk balsamic vinegar with oil and salt and pepper.