Dear
Every food item available in Nature have 1. Carbohydrate, 2. Protein, 3.Lipid, 4. Vitamins, and 5. Minerals. Their quantum varies.
If one is a non-athlete the following may be followed ( individual variations will be there)
Morning
One fistful rice/wheat + One fistful Fruit + One fistful Vegetable + One glass of Milk.
Lunch
Two fistful rice/wheat + Two fistful fruit + two fistful Vegetable + One glass of Milk
Night
One fistful rice/wheat + One fistful fruit + One fistful Vegetable + One glass of Milk (before going to bed)
----------------
Ant is the strongest animal with very little muscle on its body. And it is vegetarian and also nonvegetarian like man. So, non-vegetarian food is not compulsory in man. All aminoacids (essential/nonessential) required for healthy human body are present in vegetarian food.
If one wants nonvegetarian food eat only roasted pieces on flame without adding spices including pepper on the pieces of flesh.
This is my observation.