Quick cook Grilled sweet potatoes with feta & olives Sweet potatoes, potatoes in the us barbecue extremely well and are a good, match for this tangy feta cheese relish. The feta mixture makes a great filling for baked potatoes -just add 4tbs Greek yogurt. Preparation time: 15min cooking time: 15min 348per serving; serves 4 1 large sweet potato, weighing about 500g (1lb 2oz) 4tbs Olive oil plus extra to brush salt and ground black pepper 200g (7oz) feta cheese2