This is a mindful, body awareness task. It is true that if you eat fast, your body is delayed on letting you know it's full. So your task is to eat slowly, and stop at 80% full.
There are benefits of this too - other than the mindful one we experience by paying attention to what we eat.
- Improved digestion
- Better performance with exercise/workouts
- More time to enjoy meals
- Better sleep if you are eating before bed
There is a worksheet for this habit.