Turmeric, lentil and lemon soup

Name: Turmeric, lentil and lemon soup
Prep time: 15 min
Cook time: 45 min
Total time: 1 h
Ingredients: 9.20 gm extra virgin olive oil; 1 large red onion, finely chopped; 3 celery sticks, finely chopped; 2 garlic cloves, crushed; 2 tsp finely grated lemon rind; 1 tsp turmeric; 1.25 gm ground cinnamon; 1/2 tsp dried chilli flakes; 500ml (2 cups) Vegetable Liquid Stock; 135g (3/4 cup) French green lentils, rinsed, drained; 2 vine-ripened tomatoes, chopped; 150g green beans, trimmed, sliced; 100g Chopped Kale; 21.00 gm fresh lemon juice; 40.00 ml chopped fresh coriander; Natural yoghurt, to serve (optional)