Well, not extreme levels of hunger. Just the everyday, normal hunger.
One trick to avoid mindless eating is to pay close attention to when you're full. But one can also recognize that it won't be very long before hunger will strike again.
Eating more when you're already feeling full isn't that pleasant. How unfortunate if we always felt full and never fully experienced the anticipation of satiety.
This may be something to remember when you know you're feeling like you've had enough, but another part of you wants to keep going. To step back from it, and remember that soon your hunger will be a kind of blessing, increasing the enjoyment of the food you will eat in the future.
The things we lack in our lives add depth, shadow, and dimension. Without hunger there can be no true satisfaction.