3/4 cup cooked lentils (from a 15 oz can)- rinsed and drained
2 tsp red wine vinegar
Directions
In a medium saucepan, heat oil over medium heat. Add onion, carrot, celery, and garlic. Season with salt and pepper. Cook. Stir occasionally until onion softens- 3-5 minutes.
Add broth. Bring to a boil and cook for 5 minutes.
Add lentils and cook until soup thickens slightly, 3-5 minutes.