I happened to notice a sign in the window of Roma Bakery on Somerville Ave in Somerville (near Target) that said "Coming Soon Roma Seafood" I have driven reasonably often and hadn't noticed that before, but for all I know they could have had it for a year. At least now I'll keep an eye open for changes.
Also, there is a relatively new Brazilian snack place Café da Fazenda in Everett at 389 Main St (towards Rt 60). I have their menu, but many things are made to order and some should be ordered in advance, so I wanted to understand it a bit better. It is a bit like Petisco's in Somerville that I have mentioned a few times -- pastries, snacks, soups, but they also sell a small tray of lasagna... It definately seems interesting, but need to experiment more and I will write a review.