Indian Spiced Lentil Soup

Every time I make lentils, I think of Neil from The Young Ones. That has nothing to do with this soup at all, I just wanted to mention that lentils conjure an image of Neil in my mind. 1/4 cup olive oil1 1/2 cups chopped onion1 cup chopped carrots1/2 cup chopped celery4 minced cloves garlic6 - 8 cups water2 cups lentils2 tsp. ground coriander2 tsp. ground cumin2 tsp. garam masala1 tsp. sweet or