Red lentil dahl recipe

Ingredients

• 1 cup split red lentils
• 2 cup s water
• 2 cassia/cinnamon stick
• 2 tbsp ghee
• 1 medium onion
• 1 tsp ground cumin
• 1 tsp ground coriander seed
• 1 tsp crushed mustard seed
• 1 tbsp garlic
• 1 tbsp ginger
• 1 tsp turmeric
• chilli or cayenne pepper
• 2 tsp garam masala
• 1 tbsp tomato purée
• salt and pepper