The way to eat less is to reduce carbs and increase healthy fats. Carbs spike your blood sugar, which your body then works at removing, causing a sugar crash a couple of hours later where you are hungry, which is why people snack between meals. If you avoid carbs, you avoid the sugar spike and crash. Instead of carbs, eat healthy fats. Fats don't spike your sugar and they keep you satiated for hours on end. Keep your protein at a normal level. Protein increases blood sugar some but not enough to cause a sugar spike and crash and make you hungry.