A check on the place last night indicates that Il Panino Express appears to be close to opening in Jamaica Plain, which jibes with a Twitter post from earlier in the evening. Based on the restaurant's Twitter page, the new South Street eatery (which will take over the former Primo Brothers Pizza space) is indeed connected with Trattoria Il Panino on Parmenter Street in the North End along with Il Panino Cafe and Grill on Centre Street on the other side of JP. No specific opening date has been given as of yet; as soon as we find out when it may open, we will post an update here.
[January 22, 2016 update: Eater Boston states that the new Il Panino Express is now open on South Street in JP.]
The address for this new dining spot in Jamaica Plain is: Il Panino Express, 172 South Street, Boston, MA, 02130. Its website can be found at http://www.ilpaninoexpress.com/
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[Related article from our sister site (Boston's Hidden Restaurants): Slideshow--Twelve Pizzas in the Boston Area and Beyond]