Lentil Soup with mint

1 1/2 cups dried lentils 6 cups water , plus additional as needed 1 1/2 teaspoons salt 1/2 teaspoon cracked pepper 1/2 teaspoon whole cumin 1/2 teaspoon dried[...]

40 ml olive oil 1 large brown onion, finely chopped 2 garlic cloves , crushed 1 medium carrot , coarsely chopped 1 stick celery , coarsely chopped 2 teaspoons[...]