Chop the ginger and garlic and cut chicken into bite size chunks. Mix all the marinade ingredients together into the chicken and cover in fridge for at least an hour.
Once marinated, cook chicken in batches till brown (not cooked through) in hot oil (I use rapeseed oil). Once brown pop into a bowl. Then in same pan add a bit more oil and cook onions then add spices once caramelised.
Add all other curry ingredients (except yoghurt), then re-add onions into a jug and blitz till smooth. Then add back into pan, re-add chicken and slowly add yoghurt (take off heat to stir yoghurt through), then simmer on low for an hour or so. Squeeze half the lemon in. Then serve. Garnish with lemon and coriander with few drops of yoghurt. Serve with steamed basmati rice.
