The problem you are talking about should be "holding noon" in Buddhism. Monks only eat one meal a day, not in the morning and evening. I spend most of my time meditating and chanting. Read Buddha. Ordinary monks can't do it, and their bodies can't stand it. Only trained monks can do it.

Do you mean "vegetarian" when you say clear food? I think so, too. Only people who practice Buddhism have a meal. The rest is impossible.