According to Healthy Diet Pyramid you can eat foods, fruits and takes nutrition for your better health.

i don't believe in believe in, i like meat meals.

I think Good Food must be clean, digestible, and free from harmful element and containing good nutrition. If you mention food as diet, then good food must be well balanced.
In different age and condition, good food will be different. In case of an infant, meat will not be a good food, his good food is milk but in case of a healthy adult, meat is a good food.
Good food also depends on processing. Egg is a good food. But if you do not cook it properly, it may not be a good food for all. It may inhibit digestion and absorption.
Good food also must be disease free. Milk is a good food and also an ideal food. But milk come from a cow which is suffering from mastitis must not be a good food.
So, what is a good food and what is not, that depends on many factors. It is not absolute. Some food is good for certain people but not for other.

Eat 55gm of fibre daily and have extremely low levels of bowel cancer.The Satiety Index, composed by Dr. Susanne Holt,
from University of Sydney, shows that wholemeal breads are nearly 50 percent more filling than white bread.
Because fibre increases your level of cholecystokinin, a harmone that slows the rate at which your stomach digests food and
makes you feel fuller for longer.