Peel sweet potatoes and cut into 1-inch pieces. Trim the ends off the beets and cut into 1-inch rounds. Chop the greens. Pour water into a large saucepan and place steamer basket in the saucepan. Put the above ingredients into the steamer basket and bring water to boil. Cook covered for 7–10 minutes. Remove from basket and place in food processor. Add the avocado. Blend until desired consistency.
Makes about 4 cups of baby food and can be portioned into smaller containers. I prefer small glass Mason jars to freeze or keep in the refrigerator.