Trim off all the peel and white pith from the oranges. Halve lengthwise and then slice crosswise into half-moons (remove any seeds). Transfer to a large bowl and add the strawberries and grapes.
Combine the honey and vanilla bean in a small saucepan and warm, stirring, over low heat until the honey is warm and pourable and speckled with vanilla beans, about 3 minutes. Remove the vanilla bean and scrape out any remaining seeds and stir them back into the honey; discard the bean pod. Pour over the fruit and toss well. Set aside to cool. Serve at room temperature or refrigerate until cold.
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