Step 1: Peel and cut the yam into segments.

Step 2: Add a spoonful of white vinegar to the water in the pot, add the yam segments as the water boils, blanch for a minute and drain.

Step 3: Mix the honey sauce: two spoons of sugar, three spoons of honey, two tablespoons of orange juice.

Step 4: Simmer over medium-low heat until large bubbles form.

Step 5: Add the yam, add a dozen or so goji berries, and simmer over the lowest possible heat.

Step 6, about twenty minutes, to the juice thick when you can turn off the fire out.