Fud introduction to baby at 5 mnt 6 days

Mt baby girl is 5 mnths 22 days old today..started giving her fud from 5 mnths 6 days that is  homemade cerelac (made with rice + toor dal + jeera) once in a day during afternoon that is two to three spoons.Her weight is 5.7 kg..bw 2.8kg..she was SGA with abdominal circumference lagging by 4 weeks..rest all fine..had major accident during 5th mnth pregnancy, my treatment couldnt be completed then as it may harm baby..i lost all my upper teeth in accidnet..so now doctor suggested that i should start treatment as iam not able to eat anything well..as tratment involves rootcanal and other sessions with painkillers i stopped breastfeedin since last mnth, i feed herjust once or twice in a day.. Currently she is mostly on formula ( nanpro stage 1 ) since almost two mnths.. So pls suggest how I can increase her weight with solid fud... How many times a day now? By the way she looks lean but she is very active.rolled at 3 mnths 21 days.. now she is on all her fours position and trying to crawl