plain rice porridge. no sugar/ salt. first time baby only eat 1/2 teaspoon only. you can make your own chicken stock/ anchovies powder as your baby grow up. give plain things first, see allergic reaction for few days and move on to fruits or something that have natural sweet/ salty taste. babies don't rely on food early this stage just for practice so keep breastfeeding/ bottle feeding regurlarly. also monitor the poop and see the poop chart.