1st solid food

Hi mga momsh my LO is turning 6mos this week, ano po kaya the best recipe as his 1st solid food? Pwede po ba haluan ng formula milk yung food niya? Once a day lang po siya papakainin? Tuwing anong oras po the best siya pakainin? Hehe as a first time mom wala talaga ako idea and I'm very excited na kinakabahan 🥰😅. Thank you in advance