Thai-style BBQ chicken recipe

Name: Thai-style BBQ chicken recipe
Prep time: 15 min
Cook time: 1 h 15 min
Total time: 1 h 30 min
Cuisine: Asian, Thai
Ingredients: 1/3 cup (75g) brown sugar; 1/4 cup (60ml) fish sauce; 1/4 cup (60ml) salt-reduced soy sauce; 1 tbs vegetable oil; 1 stem lemongrass, sliced; 10 coriander sprigs; 8 garlic cloves, peeled; 2 Coles Australian RSPCA Approved Whole Chickens (about 2.2kg each); 2 x 375ml cans beer; 1/2 cup (110g) brown sugar; 1/3 cup (80ml) lime juice; 1/4 cup (60ml) rice wine vinegar; 2 tbs fish sauce; 6 garlic cloves, finely chopped; 4 long red chillies, seeded, finely chopped; 2 tbs finely chopped coriander