Place the chicken in a saucepan. Add the water, lemongrass, lime leaves, half the garlic and salt. Bring to the boil over medium-high heat. Reduce heat to medium-low. Cover and simmer for 25-30 minutes or until the chicken is just cooked. Transfer the chicken to a plate, reserving the poaching liquid. Cool slightly. Remove and discard the skin and bones. Shred the chicken. Transfer to a bowl and keep warm.