im muslim and i have fasted for one month, like 12 hour a day in summer. from fasting you can loose weight or you can gain weight.
when people fast most of the time they gain weight because when it is time to eat they eat loads of food until they become so full, when this happens it forces their belly to move forward and expand, even though they havnt eated for very long hours.
but if you fast, you will have eat a small amount of food when you brake just enough so that you are not hungry or full.
but the bad things about fasting is that you wont be able to concentrate allot, you often get angry quicker, you will mostly be tired etc. but its your choice and if you do you will loose weight rapidly.
source: experience from fasting for one month for 7 years.
to conclude, when you fast have breakfast in the morning then eat at around 8, but not to much, if you have questions let me know.