Stella Blu is a nice tapas place downtown and the Peddlers Daughter is an Irish pub that also has pretty good food.

I am at this little breakfast place and everyone knows each other.  It's really pretty cool 😊

Yes, I know.

Southern Nashua near MA border (Daniel Webster highway) is mostly chains. Main Street has much better options.

Surf has amazing seafood and raw bar items. MT Local is more farm-to-table stuff. Both owned by the same group, excellent quality and service. They have another restaurant up the road in Merrimack called Buckley's Great Steaks - excellent, well, steaks. Can't go wrong with any of the three. They're all 'nicer' places.

More casual options include Martha's Exchange (upscale brewpub), Peddler's Daughter (Irish pub), and Portlnd Pie Co. (pizzas)

Second the recommendation for Stella Blue.

For drinks and snacks, Try Codex - it's really cool. Speakeasy-style cocktail bar. You have to find the hidden entrances to get in. ;-