For the poached chicken, combine garlic, chilli, coriander root and salt together in a pestle and mortar blending to a smooth paste. Rub all over chicken breasts, cover and refrigerate for 2 hours to marinate.
Place chicken breasts in a small saucepan and cover with cold water. Place over a medium heat and slowly bring to the boil. Reduce to a simmer, cover and cook for 2 minutes. Remove from heat and allow to steep for 15 minutes or until chicken is just cooked. Remove from cooking water and allow to cool. Tear into bite sized pieces.
For the dressing, combine garlic, orange juice, zest, lime juice salt, pepper and olive oil in a screw top jar, shaking vigorously to combine. Set aside until required.
To serve, place chicken, mango, chilli, mint, coriander, baby spinach and cucumber together in a large mixing bowl, tossing to combine. Season with salt and pepper.