Creamy chicken korma

Name: Creamy chicken korma
Ingredients: 2 tbsp vegetable oil; 1 large onion, chopped; 4 whole cloves; 4 cardamom pods, crushed; 4 skinless, boneless chicken breasts, cut into bite-size pieces; 3 garlic cloves, crushed; 4cm/1½in piece of fresh ginger, peeled and grated; 1 tsp ground coriander; ¼ tsp ground allspice (optional); 1½ tsp ground cumin; ½ tsp ground turmeric; 1 tsp mild chilli powder; 2 tsp tomato purée; 75g/3oz ground almonds; 250ml/8fl oz chicken stock; 200ml/7fl oz double cream; salt and freshly ground black pepper; 50g/2oz flaked almonds, toasted; chopped coriander, to garnish (optional)