Combine the oil with all the other ingredients up to and including the sugar. Set aside half of the marinade.
Mix the mince with the remainder of the marinade. Heat the oil in a non-stick frying pan. Fry the meat for approx. 4 mins., add the bean sprouts and lime juice, pour in the reserved marinade, season.
In a bowl, mix the vinegar with all the other ingredients up to and including the salt. Add the spring onions, mix, leave to infuse for approx. 5 mins. Stir in the cucumber and pepper.