If you are visiting Kauai or just want a smile and a nice greeting Pono market will be a good choice. It's located in the "strip" of Kapaa town among an assortment of locally owned shops.
If you want to put together a "plate lunch" picnic, I recommend getting there by 11:00 as its no secret that Pono has great "grinds" (food).
Get in line and Choose from an assortment of local Hawaiian delicacies then go enjoy one of Kapaa towns great beaches.
Be aware that they DO NOT take credit cards or checks..its old fashioned and good! (Pono).