Toast all of the spices, except the pink peppercorns, in a small heavy skillet on medium heat, stirring, about 5 minutes. Transfer spices to a mortar and pestel to cool before grinding together. Add the pink peppercorns when grinding the toasted spices. A coffee grinder, or other spice grinder can be used instead of a mortar and pestel.
Cook edamame, in batches, in salted boiling water until tender, about 4 minutes. Immediately transfer, with a slotted spoon, to an ice bath to stop cooking. Return water to a boil between batches. Drain in a colander.
Toss edamame with the spice blend before serving. You may not need to use it all. Add it to taste. Serve at room temperature.
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