Combine mustard, lime, ginger and coriander leaves in a large bowl to form a marinade.
Mix marinade with chicken and leave to sit for 1-2 hours or preferably overnight.
In a large non-stick frying pan, cook chicken in batches. Once cooked, place on a plate and cover with aluminium foil to keep warm. Discard left over marinade.
Warm corn tortillas in the microwave, oven or a sandwich press.
Top tortillas with lettuce, cucumber, carrot, spring onion tops and finally the cooked chicken. Fold wrap aroundfilling and enjoy!