Pumpkin malai curry

Name: Pumpkin malai curry
Cuisine: Asian, Indian
Ingredients: 1.2kg pumpkin, such as Delica; rapeseed oil; salt; 2 large red onions, finely chopped; 2cm ginger, peeled and finely grated; 5 cloves of garlic, crushed; 200ml tomato passata; 2 tsp ground cumin; ¾ tsp ground cinnamon; 1¾ tsp Kashmiri chilli powder; 1½ tsp garam masala; 1 tsp caster sugar; 600ml coconut milk (1½ tins); 1 lime, cut into wedges; optional: toasted flaked almonds or fresh coriander, to serve; TOFU