Lucknow Mixed Vegetable Biryani

Name: Lucknow Mixed Vegetable Biryani
Ingredients: * 2 cup basmati rice; * 1 tbsp salt; * 2 cinnamon stick, divided; * 10 whole clove, divided; * 8 green cardamom pod, divided; * piece fresh ginger, minced; * 10 clove garlic, minced; * 3 small hot chile pepper, minced (optional -i left out); * 6 tbsp vegetable oil, a needed, divided; * 3 large onion, thinly sliced, divided; * salt to taste; * 2 medium large sweet potato, washed and; * 4-5 small medium yukon gold potato, washed and; chunk; * 1 tsp garam masala, to taste; * 1/2 tsp paprika or cayenne; * 1/4 tsp turmeric; * 1/4 tsp asafetida; * 1 small head cauliflower,; * 1 cup fresh or frozen pea; * 3/4 cup plain whole fat greek yogurt; * 2 tbsp melted ghee; * 2 tbsp milk; * pinch of saffron