Lahori Chicken Karahi

Name: Lahori Chicken Karahi
Ingredients: 1/4 cup oil or ghee; 400 gm dressed chicken; 4 tbsp yoghurt; 200 gm tomatoes; 2 chopped green chillies; 1/2 tsp salt; 1/2 tbsp ginger paste; 1 tbsp garlic paste; 1 tbsp coriander powder; 1 tsp red chilli powder; 1 tsp cumin powder; 1/4tsp Less than turmeric powder; 1/2 tsp chaat masala; 1/4 tsp garam masala powder; 1 tsp Kashmiri red chilli powder; 1/2 tsp black pepper powder; 2 whole green chillies; 1-2 tbsp water; 1 tsp dry fenugreek leaves; as required Chopped coriander leaves; 1 tbsp Julienned ginger; 1 tbsp lemon juice