Potato Korma

Name: Potato Korma
Ingredients: 4 pieces large russet potatoes washed, peeled and cut in cubes; 1 piece large yellow onion chopped finely; 2 teaspoons chopped ginger; 1 tablespoon butter or ghee; 1 tablespoon cumin; 1 piece serrano pepper chopped; 1 cup yellow raisins; 2 tablespoons roasted cinnamon and coriander powder; 1 teaspoon turmeric powder; 1 cup cashews; 2 cups coconut milk; 2 cups vegetable broth; 2 cups frozen peas; 6 cups fragrant basmati rice cooked with cumin seeds