Eknath Easwaran, in his book "Words to Live By" proposes this eating plan:
I suggest eating moderately. Fasting may not be as easy as feasting, but after a while it is not too different. Both are extremes. It is not hard to go the extreme way, but what is really difficult is neither to fast nor to feast, but to be moderate in everything we do. This is what the Buddha called the Middle Path. It requires great artistry and vigilance. Instead of negating the body and senses, we train them to be valuable instruments.
I try to eat good, wholesome food in temperate quantities in order to strengthen the body. If my body is not strong, I cannot contribute to the welfare of society, and I cannot give the best account of myself in life. We harness our physical, mental, and intellectual capacities not to make money or achieve power or fame, but to use these faculties to make our contribution to life