Barbecued chicken

Ingredients (serves 4): 2 corn cobs with husks attached 60ml (1/4 cup) olive oil 1 tbs fresh lemon juice Salt & freshly ground black pepper 4 (about 200g each) single chicken breast fillets, trimmed 800g sweet potao 4 red onions   Method: Use a wire brush to scrub clean your barbecue plate and grill before…