Lentil Vegetable Soup with Curry Spices

3 medium carrots, diced
3 stalks celery, diced
1 medium yellow onion, diced
1 tablespoon olive oil
1/8 teaspoon salt
32 ounces chicken broth
3 tbsp chopped fresh flat-leaf parsley
1 1/2 cups French green lentils or Italian black lentils
3 cloves garlic, minced
2 cups water

1 1/2 tsp fennel seeds (use a mortar and pestle to crush)

Or use seasonings for health benefits:
1 tsp ground turmeric
1 1/2 tsp ground coriander
1 1/2 tsp ground cumin
1 tsp yellow curry
red pepper flakes