Barbecued steak and vegetables

Ingredients (serves 4): Olive oil cooking spray 2 red capsicum (bell pepper), quartered lengthways 3 zucchini (baby marrow), quartered lengthways 400g orange sweet potato, peeled, thinly sliced 2 (200g each) porterhouse, sirloin or rump steaks, trimmed 1 tablespoon balsamic vinegar 3 teaspoons olive oil 1/3 cup basil leaves, shredded Method: Preheat a barbecue grill on high…