When introducing new foods after a period of gut sensitivity, start with simple, easily digestible items like ragi porridge, rice porridge, or mashed fruits. If your baby has previously reacted to a specific food (like moong dal), proceed with caution, but don't be afraid to try other textures or ingredients. Always introduce one new food at a time in small quantities, and wait a few days to monitor for any reactions like red spots or changes in stool. If in doubt, consult your pediatrician before trying specific proteins like eggs or nuts.