Beef biryani

Name: Beef biryani
Cuisine: Asian, Indian
Ingredients: 315g basmati rice; 670ml low salt chicken stock; 7 cloves; 1 star anise; 3 bay leaves; 0.25tsp ground cinnamon; 1 tsp salt; 2 tbsp unsalted butter; 1.5 tbsp vegetable oil; 3 garlic cloves, finely minced; 2 tsp finely minced ginger; 1 small brown onion; 500g beef mince; 0.25tsp ground cinnamon; 0.5tsp cayenne pepper; 0.75tsp turmeric; 1.5tsp ground coriander; 2 tsp garam masala; 1 tsp salt; 65g passata; 125ml water; 190g plain yoghurt; 15g mint leaves; 2 tsp fresh lemon juice; 0.25tsp salt; 1 tightly packed tsp saffron threads; 2 tbsp boiling water; 35g crispy fried shallots; 10g roughly chopped coriander leaves