1In large saucepan or skillet, place steamer basket in 1/2 inch water (water should not touch bottom of basket). Place sweet potato cubes and cauliflower in steamer basket. Cover tightly and heat to boiling; reduce heat to low. Steam about 12 minutes or until sweet potato is fork-tender. Drain, reserving steaming water. Cool slightly.
2In blender or food processor, place sweet potato and cauliflower. Add chickpeas. Cover; blend or process until as smooth as desired, adding some of the steaming water if needed.
3Serve immediately, or cover and refrigerate up to 24 hours. If freezing, spoon puree into ice cube trays, and freeze until solid. Transfer cubes to resealable freezer plastic bag. When ready to use, place individual cubes in the refrigerator to thaw.