Preheat oven to 425°F. Line a baking sheet with parchment paper.
Peel sweet potatoes and cut into ½ inch cubes.
Soak potatoes in a bowl of cold water for 10 minutes and strain.
Return the sweet potatoes to a dry bowl, patting them dry. Drizzle with olive oil and sprinkle with rosemary salt, garlic powder and black pepper. Toss the potato cubes to coat and transfer to the parchment-lined baking sheet.
Roast at 425°F for 20-25 minutes, remove from oven and add the fresh cranberries, cinnamon, and brown sugar; toss to coat. Return to the oven for 10 minutes.
On your serving dish, spread a jar of Cape Cod Horseradish around the edges, add roasted sweet potatoes and cranberries in the middle and serve with a sprinkle of crumbled feta and a drizzle of honey.