What to do my baby doesn't eat anything, just puts the stuff in her mouth for long time?

I suggest, find different ways to feed her. Engage her in some play and while playing feed her simultaneously. Try new recipes. Plate the food in an attractive manner and do not give her choice. Do let her eat with her own pace but also do not that time stretch beyond half an hour as by that time food also becomes cold, messy and the kid throws more tantrums in eating. It is better to pick up the food and say after two hours give her something else to eat. Don't always be after the baby with the food plate. Feed her when she is hungry.