About 10 Years ago, I trained myself not to eat at night. It was extremely difficult. Some nights I went to sleep very hungry, but I didn’t give up. (Once you sleep you forget!)
By now, not eating at night comes so natural to me, that I don’t even think twice about it. I can’t even look at someone who eats late at night!! I do cheat here and there, but overall, I have no urge to eat after supper.
(And I’m still 20 lbs overweight :()