I always mean to mention La Paloma on Newport Ave. in Quincy as someplace I enjoy grabbing lunch for under $10. I had the chicken fajitas yesterday, as a change from my chicken enchiladas in verde sauce. Everything is very fresh tasting, comes hot to the table, generous fresh tomato rice and guac and sour cream sides, good refried beans (if you like that stuff, which I don't) and FREE refills on sodas... The chicken was tender, well seasoned, and a nice portion with three tender, warm flour tortillas to wrap them in. A slightly higher green to red pepper ratio than I like, but hey, I can pick around 'em.
Being of irish and norwegian extraction, I've no idea if they're authentic, but they are tasty. And the hot out of the fryer corn chips and salsa are addictive.
A few weeks ago I had a nice girls' lunch out at Fuji on N. Hancock Street (not the one in Quincy Center, but the one near the Alumni Cafe and the Super 88) and enojoyed the bounty that is their bento box lunch for $7. I had the salmon bento box, which is miso soup, salad with the ginger/miso/carrot dressing, sticky rice, vegetable tempura (really good, esp. the sweet potatoes) and teriyaki salmon. It's not the epitome of japanese food, but there is always a table, they're quick, and the servers are always very nice. It's super clean, to boot, which is a pet peeve of mine at lunchtime. I also like their veggie sushi, but can't comment on the "real" sushi, since I am too chicken to go there. Lunch prices are quite reasonable, esp. the bento boxes, and sushi portions are generous and reasonably priced. I've never been for dinner.