1.Heat half the oil in 6-litre (24-cup) pressure cooker, cook lamb, in batches, until browned. Remove lamb from cooker.
2.Heat remaining oil in cooker, cook onion, garlic and chilli, stirring, until onion softens. Add spices, cook, stirring, until fragrant. Return lamb to cooker with undrained tomatoes and stock, secure lid. Bring cooker to high pressure. Reduce heat to stabilise pressure, cook 25 minutes.
3.Release pressure using the quick release method, by carefully turning the pressure valve with tongs (steam can burn) to release the steam; wait for pressure to drop, then remove lid. Stir in spinach and coriander, season to taste.
If you have an electric pressure cooker you won’t need to reduce the heat to stabilise pressure, your cooker will automatically stabilise itself. Always check with the manufacturer’s instructions before using.