Hi

Miguel means that Spanish people enjoy sharing good meals together, 'Full bellies and Spanish blood go hand in.

I believe he ment that in a spanish house hold you will never go hungry. No matter how little your family may have, those around you whether it may be family, friends, or neighbors in a spanish community everyone will help each other out. Just like the women on the train was so willing to give to those that were in need, even though she herself was in need.