Charred Corn Salad

• 2 tbsp extra virgin olive oil
• 2 corn cobs
• 2 yellow capsicums (peppers)
• 400 g butter beans, drained
• 0.5 cup coriander (cilantro), roughly chopped
• 200 g cherry tomatoes, halved
• 120 g rocket (arugula)
• 3 tbsp Greek yoghurt (plain)
• 1 tbsp harissa paste
• 2 tbsp lime juice