Add half the oil and garlic and onions to the inner pot of pressure cooker, and SAUTE/SEAR on HIGH HEAT, cooking for approximately 5 minutes. Once they have turned opaque, remove them and place in a dish off to the side.
Add final half of the oil and add half the meat to the inner pot. On the SAUTE/SEAR HIGH HEAT Setting, cook until it is browned, remove and repeat with the second lot of meat. Once browned, add the first half of the meat back to the pot
Add the massman paste and stir through the meat until fragrant.
Add the Onions back into the inner pot, along with the stock/broth, coconut milk, cinnamon sticks, juice of half a lime, juice of half an orange, salt, cashews and potatoes.
Seal lid and cook on MEAT/POULTRY setting in pressure cooking mode for 40 minutes. (Don’t forget to press start after settings are selected).
Once the timer has gone off, release the steam vent and remove the lid and stir. Add in the fish sauce, juice of the lime (second half), juice of orange (second half).
To thicken the sauce, make a cornflour slurry, in a small jug/cup with the cornflour and water. Add to the curry and stir through to thicken.
Serve with chopped coriander, lime wedges and rice/naan bread if desired.