Red Onion-Balsamic Topper

Directions

1. 1
   Heat oil in large skillet on medium heat.
2. 2
   Add onions; cook 10 min.
3. 3
   or until tender, stirring frequently.
4. 4
   Stir in vinegar; cook 1 to 2 min.
5. 5
   or until vinegar is evaporated.
6. 6
   Cool.
7. 7
   Top crackers with onion mixture and sour cream just before serving.