off ends of oranges; using a paring knife, remove peel, pith, and outer
membranes, following the curve of the fruit. Working over a bowl to catch
the juices, cut between sections to remove whole segments; add segments to
a large bowl. Squeeze juice from membranes into a bowl; measure out 3
tablespoons juice; reserve remaining juice for another use.
In a small bowl, whisk
together reserved orange juice, vinegar, and olive oil; season with salt
In a large bowl, combine
oranges, lettuce, avocado, and radishes. Drizzle with dressing as desired,
and toss gently to combine. Serve immediately.
To segment an orange, peel and trim it. Then
hold the orange over a bowl and release each segment by cutting toward the
center along the membranes -- first on one side of the segment, then on the