I need some help to give solids food to my baby girl!!!

My baby girl is 7.5 but couples of ago she has fever for like three days due to a teeth that was coming , during those days she loses her appetite , but she star eating again but she don't want any solid just formula , mashed fruits and oatmeal cereal mixed with fruits ...Is my first time Mon and I don't know what to do?? Can I mix the cereal with something else?? As well I tried to give a yolk egg and she doesn't like it.. can I mix the yolk egg with something ?I will appreciate any suggestions.