Our family has been having lunch at Box Lunch for two decades. This venerable establishment (more that 30 years in the Wellfleet store) is a great place for a good, reasonable-priced lunch on Cape Cod.
Their niche is the 'rollwich' - sandwich wraps. Their ingredients are fresh and the formula combines sandwich elements to create very tasteful combinations in which no single element dominates. Wife and I both like the John Alden - turkey with romaine, tomato, chopped sweet onion and cranberry sauce. And because every sandwich is made to order, wife can have hers without onion.
The downside is that the stores themselves are unpretentious and spartan. Wellfleet is tiny - there is only one eat-in table, while P'Town diners have to cluster around a few outside tables or sit on a sidewalk bulkhead. Neither of those stores have restrooms. Eastham has more tables and restrooms.
But the food is good and the price is right. So Bix Lunch will continue to be one of our regular stops