Preheat oven to 220℃ (200°C fan forced). Line a large baking tray with baking paper. Place the chicken thighs on the tray. Drizzle with olive oil and rub with crushed garlic, salt and pepper.
Roast for 25-30 minutes until the skin is golden and the chicken is mostly cooked through.
While the chicken is roasting, mix together the chilli jam, soy sauce, water and garlic in a small bowl.
Remove the tray from the oven. Add the red onion and capsicum around the chicken, tossing them lightly in the tray juices and a small drizzle of olive oil.
Using roughly two-thirds of the glaze, brush the chicken generously and drizzle a little over the vegetables, gently tossing them to coat (the veggies). Return the tray to the oven and bake for 15 minutes
Remove tray from oven and add the broccolini, tossing in the tray juices. Brush remaining glaze over the chicken and vegetables. Bake for a further 10 minutes or until vegetables are tender and chicken is fully cooked and the glaze is sticky and caramelised.
Rest for a few minutes before serving. Serve over rice and garnish with coriander leaves and lime wedges for squeezing over the top.