1. Wash the cauliflower thoroughly under running water to remove any dirt or impurities.
2. Cut the cauliflower into small florets, discarding the tough stem.
3. Place the cauliflower florets in a steamer basket, and set the steamer over boiling water.
4. Steam the cauliflower for about 10 minutes, or until they are very tender and can be easily pierced with a fork.
5. Remove the cauliflower florets from the steamer and allow them to cool slightly.
6. Transfer the steamed cauliflower to a blender or food processor.
7. Add 150 ml of water to the blender to help the blending process.
8. Puree the cauliflower until it is completely smooth and lump-free. You can add a bit more water if the puree is too thick.
9. Allow the puree to cool to a safe temperature before serving it to your baby.

Summary:
This Cauliflower Puree Snack is an ideal meal for babies aged 4-10 months due to its smooth texture and gentle flavor. Cauliflower is rich in vitamins C and K, and also provides necessary fiber, making it a nutritious choice for growing infants.

Storing Options:
Store any leftover puree in airtight containers in the refrigerator for up to 48 hours or freeze in ice cube trays for longer storage. Frozen puree cubes can be thawed as needed.

Possible Side Effects/Allergies:
Cauliflower is generally well-tolerated by babies, but it can cause gas or bloating in some infants. Introduce it gradually and observe for any signs of digestive discomfort. Always consult with a pediatrician before introducing new foods to your baby’s diet.