Green lentils (dry): 100g (1/2 cup), Onion: 100g (1 medium, diced), Carrots: 100g (1 large, diced), Celery: 50g (1 stalk, diced), Tomatoes (canned, diced): 200g (1 cup), Spinach: 60g (2 cups), Garlic: 6g (2 cloves, minced), Vegetable broth: 500ml (2 cups), Greek yogurt (low-fat): 60g (1/4 cup), Lemon juice: 10ml (2 tsp), Cumin: 3g (1.5 tsp), Coriander: 2g (1 tsp), Turmeric: 2g (1 tsp), Olive oil: 10ml (2 tsp), Parsley: 10g (2 tbsp, fresh, chopped), Black pepper: to taste