Lentil And Vegetable Soup - cooking recipe

Ingredients

1 tablespoon olive oil
2/3 cup diced celery
1/3 cup diced white onion
1/3 cup diced carrot
3 tablespoons diced shallots
2 teaspoons minced garlic
2 quarts vegetable stock
1 1/4 cups dried brown lentils
2 teaspoons whole grain mustard
2 teaspoons red wine vinegar
1/2 teaspoon salt (optional)
1/4 teaspoon pepper

Preparation

Heat oil in a saucepan over medium heat.
Saute celery, onions, carrots, shallots and garlic until onions are translucent.
Add vegetable stock and lentils.
Cook uncovered until lentils are just tender but not too soft.
Before serving, add mustard, vinegar, salt, and pepper.