Praise be to Allah.
This question was put to Shaykh Muhammad ibn ‘Uthaymin (may Allah have mercy on him), who said:
“Du`a should be made before iftar (breaking the fast) , at Maghrib , because this combines weakness and humility, and because he is still fasting. All of these are means of having one’s du`a answered. After breaking the fast, one is relaxed and happy, and may become negligent. But there is a hadith from the Prophet (peace and blessings of Allah be upon him) which, if it is sahih, shows that the du`a may be made after breaking the fast. It said: ‘Thirst has gone, the veins are moist, and the reward is assured, if Allah wills.” (Narrated by Abu Dawud; classed as hasan by al-Albani in Sahih Sunan Abi Dawud, 2066). This can only mean after breaking the fast. Similarly it was narrated that some of the Companions said: “O Allah, for You I have fasted and with Your provision I have broken my fast.”
So you may pray to Allah and say whatever du`a you think is suitable .
For more, please see this answer: 65955
And Allah knows best.