The hoisin glaze goes on twice — brushed on before roasting, then spooned back over with lime juice stirred in — so it caramelizes instead of just coating the potatoes raw.
Stir together the hoisin, honey, olive oil and salt in a small bowl.
Halve the sweet potatoes and brush the cut sides with the hoisin mixture.
Place the potatoes cut sides down in a foil-lined, greased baking pan. Roast at 425°F for 25 to 30 minutes, until tender.
Stir the lime juice into the remaining hoisin mixture and spoon it over the cooked sweet potatoes.
Top with the cashews and scallion. Serve with lime wedges.
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