Kumror Dhokar Dalna Pumpkin and Lentil Cake Curry

Name: Kumror Dhokar Dalna (Pumpkin and Lentil Cake Curry)
Ingredients: 250 g pumpkin cut into thin strips; 3/4 cup cholar dal or bengal gram soaked for overnight; 2-3 green chilies finely chopped; 1 tsp kalonji or nigella seeds; 1/2 tsp turmeric powder; 1/2 tsp red chili powder; 1 tsp roasted cumin powder; 2 tbsp mustard oil; salt to taste; oil for frying For the Dalna; 1 big tomato pureed; 1/4 cup yogurt; 2 tsp ginger paste; 2 bay leaves; 1 one inch cinnamon stick; 2-3 green cardamom; 2 cloves; 1 tsp turmeric powder; 1 tsp cumin powder; 1 tsp coriander powder; 1 tsp red chili powder; 1 tsp sugar; 1.5 tbsp mustard oil; 1 tbsp ghee or clairified butter