First make your sweet onions. Pour the olive oil in a frying pan over low heat. Add the sliced onion and bay leaf and cook for 40 to 45 minutes, stirring occasionally, until the onions have reduced and are completely soft and lightly browned. You’ll end up with about four heaped tablespoons of sweet, caramelised onions. Set aside to cool.
Throw the potatoes into a bowl and mix with the