[surferjoe2007]

The healthiest grain I know of is brown/black rice and it contains no gluten.

I think Paleo follows caveman legends more than any real human biological needs.  But if your gut can't tolerrate grains you can try spinach, parsley, cilantro, watercress and/or endive.  You may also juice them in masticating juicer with sufficient calcium powder to neutralize the bitterness.  About a pint or pound a day.  You can flavor juice with apple or anything sweet.  Sealed in airtight bottles without air lasts 3-6 days.  That plus a tbsp rice bran (if tolerable), EFAs and eggs should cover your needs.  If you can't do rice bran you can juice a tbsp of fresh turmeric per day or take 1,000 mg turmeric (not curcumin).