I see some mummies give lo eat egg and lo have allergy, may I know if I give lo eat chawamushi the Japanese steam egg , is it ok? Will I be able to know if lo got allergy with egg?

How old is your baby? While, it is generally safe to let baby have eggs after 6 months, my friends usually wait till baby is about 8-12 months old. They will start off giving baby foods with eggs in them (pancakes, waffles) and see if baby has a reaction. After that, they will start feeding baby proper egg dishes like hardboiled egg or scrambled eggs. There are other ingredients in chawanmushi that baby could be allergic to like soy etc, mirin, dashi etc. Maybe hold that off till baby is older...