Fragrant and delicious paneer and broccoli masala

Ingredients

• 2 tbsp vegetable oil, plus extra if needed
• 1 pack paneer, around 225g (8oz), cut into large bite-sized pieces
• 20 fresh curry leaves (optional)
• 2 tsp black mustard seeds
• 1 tsp cumin seeds
• 1 tsp ground turmeric
• 1 onion, finely diced
• 2 garlic cloves, finely chopped
• 1 tbsp peeled and finely chopped
• Fresh root ginger
• 2 red chillies, 1 finely sliced, 1 slit down the middle but left whole
• 2 tbsp tomato purée
• 1 tbsp garam masala
• 2 tsp ground coriander
• 400ml (14fl oz) coconut milk
• 100g (31/2 oz) broccoli florets
• 1 tbsp tamarind paste/concentrate, or to taste, salt
• Sugar, to taste
• Small handful of fresh coriander, to garnish