thanks for your question. as child has upper 
respiratory tract infection try warm liquids to soothen throat. you may try hot rice water , thick hot moong dal thats green gram, tomato onion or spinach soups , rice and dal with little butter etc.
well when it comes to regular diet while child is in pink health. 
plan 4-5 feeds a day. 2-3 good meals and rest smaller ones. 
start with rice-dal n ghee or khichadi soft n ground. you can add green leafy into it. give this twice a day with good gap. 
keep 2 milk feeds. 
try porridge may be with dalia of sooji. add crushed nuts into it. 
give mashed potato or mashed sweet potato-jaggery mixture. 
introduce every new item after accepting first.
keep first while adding second. 
after child is ready to eat 4 items a day..keep it for a month .
introduce egg yellow only after a month. and full egg after one year.
start giving water intermittantly.
fruits and juices can be given ad lib. prferred are papaya, mango , banana chickoo.