Start on weekends where you can give solid/puree like egg custard (Heinz), Gerber, Cerelac. In this way you can see the allergy. Give about a week or two then get the teachers to start what you begin with from home. Then slowly venture with other food. You must inform the teachers what baby has been consuming and what they can also start from school. Do keep a lookout for signs of allergy if there any for safety.
itsallabout_mytwokids