1 1/2 pounds Earthbound Farm Organic Jewel Yams (sweet potatoes) (peeled and cut into 1/2-inch cubes, about 4 cups)
2 large quinces (1-1/2 pounds total, peeled, cored, and cut into 1/2-inch cubes, 4 cups)
6 tablespoons pure maple syrup (divided)
2 tablespoons olive oil
2 teaspoons Sea salt
2 teaspoons fresh thyme leaves
  Freshly ground black pepper
1 tablespoon fresh sage (finely minced)