Ingredients
3 tablespoons extra–virgin olive oil
2 cups chopped onions
1 cup chopped celery stalks plus chopped celery leaves for
garnish
1 cup chopped carrots
2 garlic cloves, chopped
4 cups (or more) vegetable broth
1 1/4 cups lentils, rinsed, drained
1 14 1/2–ounce can diced tomatoes in juice
Balsamic vinegar (optional)
Directions
Heat oil in heavy large saucepan over medium–high heat. Add
onions, celery,...