Lentil Sweet Potato Kale Soup

Name: Lentil Sweet Potato Kale Soup
Ingredients: 2 cups green lentils; 5-7 cups vegetable stock; 3 small carrots, chopped; 2 small sweet potatoes, cubed; 1 onion, chopped; 2-3 cloves garlic, minced; 1 bay leaf; 1/2 tsp dried thyme; sea salt to taste; 3 leaves kale, stems separated and rough chopped