It may be late for this response, but it would appear that a great deal of what the Bible specifies in terms of the foods available to man, what can be eaten or not, is found in the books of Genesis and Exodus, primarily, and all the first five books of the Old Testament, in general.
It would seem that the food Adam and Eve ate before the fall changed after the fall. God provided different foods, though Adam and Eve had to work to produce them. Genesis 1:29 provides some insights:
'I give you every seed-bearing plant on the face of the whole earth and every tree that has fruit with seed in it'...This includes nuts, grains, legumes, and seeds.
Plants of the field would provide different choices for them.
God told Adam that the earth would be cursed-that it would produce thorns and thistles-and that he "will eat the plants of the field" (Genesis 3:18 NIV).
In the information presented in the Bible, it would seem that most foods are referred to in the first five books of the Bible, including Genesis, Exodus, Leviticus, Numbers, and Deuteronomy.