Make this best small pressure cooker curry in a pressure cooker for an easy midweek meal. Heat 1 tbsp of the oil in a pressure cooker. Season the beef and fry in batches for 5-8 mins, turning occasionally until evenly browned. Heat the remaining oil and butter in the pan and fry the onion gently for 10 mins or until golden brown and caramelised.
Add the garlic, ginger, chilli, turmeric, coriander and cardamom and fry for 2 mins. Stir in the beef and cook for 1 min to coat the beef in the spices. Tip in the tomatoes, stock and sugar and bring to a simmer. Lock the lid onto the cooker and bring up to high pressure. Cook for 15 mins, then turn off the heat and let the pressure drop naturally.