Toast the cashews in a dry large saucepan or frying pan until golden, stirring frequently. Remove them from the pan and set aside.
Using the same pan, add the oil over a medium high heat and add the mince. Break up the mince as it cooks with a wooden spoon.
Cook the mince until browned all over (approx 5-7 minutes), then add the garlic and ginger. Cook for a further 5 minutes.
While this is cooking, make up the sauce by putting the cornflour in a jug or bowl and gradually mixing in the soy sauce (this is called a 'slurry' - see notes). Add in the other ingredients and stir until smooth.
Turn the heat up to high, pour in the sauce and add the toasted cashews.
Stir well so everything is fully coated in the sauce, and cook for 3-5 minutes.
Serve over rice and vegetables, sprinkled with sesame seeds.
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