Bring 2 inches of water to a boil in a medium saucepan. Add the pears and then the chard into a steamer basket, in that order. Place the steamer basket over the boiling water, cover, and cook for 7-10 minutes or unitl pears are tender and chard is wilted. Let cool slightly. Reserve steamer water.
Meanwhile, add the goji berries to a small bowl and cover with hot water. Let soak for 10 minutes. Drain.
Transfer the pears, chard and goji berries to a blender or food processor and puree for 1-2 minutes or until completely smooth, adding reserved water in 1/4 increments if needed.