Any fresh vegetable. Any fresh fruit. Any protein (beef, chicken, pork, seafood, etc).
Whole grains might or might not fall into that book's definition, not sure, but if they are permitted, you can explore lots of options that are very close to unprocessed (brown rice, whole wheat pasta, quinoa, amaranth, barley, wheat berries, steel cut oats), beans (dried is closer to unprocessed than canned, as you can control the sodium...drying is "processing", but not in a way that reduces nutrients significantly), lentils, etc.
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