Why do I have this weird eating habit?

So during the day I never feel hungry. I just always drink aton of water. Like today for breakfeast I had one cinnamin roll and a gl of orange juice. lunch I had a frozen stouffers natural chicken with mash potatoes, and dinner some lasagna. No snacks. But late at night im starving! I just had a salami sanwich and am still hungry! why si it always late at night that I feel starving? I know its terrible to eat right before bedtime. Its not like im undereating, Im 15yr old growing male. 5ft 7t 124lbs. Also is tht a healthy weight/ height ratio.