Is it among the recommended practices for fasting not to eat excessively?

Eating excessively is absolutely disliked (makrooh), and it becomes forbidden (haraam) if it leads to harm. The Sunnah is for the stomach to be divided into three parts: one-third for food, one-third for drink, and one-third for air, as the Prophet, peace and blessings be upon him, said: «Sufficient for the son of Adam are a few morsels that keep his back straight. But if he must, then one-third for his food, one-third for his drink, and one-third for his breath.» It is permissible to eat more than one-third as long as it does not cause harm. However, excessive eating, accompanied by fear of harm and indigestion, is forbidden.