Make the sweet potato chips: Preheat the oven to 400°F (200°C). Line a baking sheet with parchment paper.
Cut the sweet potato into ⅛ (3 mm) thick slices using a mandoline or sharp knife.
In a medium bowl, toss the sweet potato slices with the olive oil, salt, pepper, and thyme until well coated. Spread the sweet potatoes on the prepared baking sheet in a single layer.
Bake for 20-25 minutes, flipping halfway, until golden brown. Let the sweet potato chips cool to room temperature.
Make the cranberry salsa: Add the cranberries, sugar, scallions, jalapeño, ginger, lime juice, and salt to the bowl of a food processor and pulse until roughly chopped.
Transfer the salsa to a serving bowl and chill in the refrigerator for at least 1 hour, up to 4 hours.
Just before serving, top the salsa with the cilantro. Serve with the sweet potato chips.