Combine first 5 ingredients in a 2-cup glass measure; stir well. Microwave, uncovered, at HIGH 1 minute or until mixture boils and is slightly thickened. Stir until smooth. Let cool to room temperature.
Place 1 cup salad greens on each of 4 plates. Drizzle evenly with vinaigrette. Cut orange slices in half. Arrange slices over salad greens, and sprinkle with pecans.
Tip: For a richer, nuttier salad, toast the pecans in a skillet over medium heat for 5 minutes, stirring often.
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