The Stable Restaurant & Bar - Falmouth

Great pizzas, pies and a large, specialist cider menu.  Its the Old Customs House, so a characterful building, good atmosphere and views over the harbor.  They are also dog friendly: http://stablepizza.com/home/stable-falmouth/

The Rosevine Restaurant - Portscatho

Acclaimed restaurant on the Roseland Peninsula.  They also have a take away service, so perfect for a yummy beach picnic: http://www.rosevine.co.uk/restaurant-rosevine-cornwall/

Top 10 Places to eat out in Cornwall this Summer

Not all on the doorstep, but a few ideas for some great food experiences: http://www.huffingtonpost.co.uk/james-nathan/cornwall-tips_b_6853434.html