Try this recipe.... I've tried it many times and love it.

Squashed chook with spicy yogurt marinade and coconut and lime raita - Dairy Australia

INGREDIENTS
2 x 1.5kg whole chickens

Spicy yogurt marinade
1 cup Australian natural yogurt
2 cloves garlic, crushed
2 teaspoons ground coriander
2 teaspoons ground cumin
1 teaspoon turmeric
2 teaspoons freshly grated ginger

lime and coconut raita
1 cup Australian natural yogurt, extra
¼ cup shredded coconut, toasted
zest and juice of 1 lime

METHOD

Using sharp, clean scissors remove the backbone of the chicken by cutting either side of the bone, trim away the wishbone. Turn over the chicken and flatten out by pressing on the breastbone.

Remove the breastbone by cutting on either side of the bone and skewer each half through the bottom of the thigh and neck to secure.

Combine marinade ingredients and spoon over chicken and allow to marinate for at least 1 hour.

Combine the lime and coconut raita ingredients and refrigerate until ready to serve.

Place chicken halves on a baking tray and roast at 200°C/180°C fan-forced for 30 minutes or until cooked through. Serve chicken with lime and coconut raita.