Sweet potatoes pudding

1 medium size sweet potato
1/4 cup almonds
1/4 cup pistachios
1/4 cup raisin
1 tsp cardomon
1/2 cup jaggery
1 cup milk
1 Tsp oil

Scrape the skin of sweet potato and cook it very soft add the potatoes in grinder add jaggery, cardomon and grind it well and take a non stick pot add a little oil add almonds, pistachios, and raisin fry it for a minute and pour the mixture that is in the grinder and cook it for 15 minutes adding 1/2 cup water and after 15 minutes add milk and stir it well cool it and serve it.