Valencian Orange Tart

Once a source of immense wealth for the city, oranges are a symbol of Valencia. They feature in this citrus-intensive, not-too-sweet tart, which is just the ticket after a filling meal. Since the orange slices decorating the tart are not peeled, be sure to use thin-skinned juicy California oranges; thick-skinned oranges will not work. Blood oranges or a combination of orange and lemon slices make a nice variation. For an extra jolt of citrus, serve the tart with the refreshing