1 red onion, finely chopped
2 sprigs fresh rosemary, leaves only, finely chopped
450g/1lb strong white flour, plus extra for dusting
vegetable oil, for greasing
3 tbsp extra virgin olive oil, plus extra for brushing
1陆 tsp salt
陆 tsp sea salt flakes
1 x 7g/录oz sachet fast-action dried yeast