1. Cook edamame in boiling water 10 minutes or until tender. Drain and set aside.
2. Place potato, chicken broth, and water in a large saucepan. Cover and bring to a boil. Reduce heat, and simmer 12 minutes or until tender. Drain, reserving 1/2 cup cooking liquid.
3. Place edamame in a food processor; process until finely chopped. With processor on, slowly pour reserved cooking liquid through food chute, processing until smooth.
4. Place edamame mixture, potato, milk, and remaining ingredients in a large bowl. Mash with a potato masher to desired consistency.
For baby: Serve spoonfuls in a small bowl or on a rimmed plate.