In a bowl, combine 3 tablespoons of the Citrus Vinaigrette with the watercress; toss and divide among four plates. Sprinkle almonds on top.
Arrange avocado and orange slices, shrimp and hearts of palm on greens; drizzle with some of the dressing. Pass the remaining dressing.
Citrus Vinaigrette: In a small saucepan, simmer 1cup orange juice until reduced to about 2/3 cup; set aside to cool. In a blender, combine 1/4 cup lemon juice, 1/4 cup white vinegar, 1 tablespoon honey, 1/2 teaspoon salt and 1/4 teaspoon ground black pepper. Add the cooled orange juice and blend. With the motor running, gradually add 1/2 cup canola or other vegetable oil and blend until combined.