I've had two nice lunches at Casey's on South Street in Natick, based on recs from this board. It's a tiny diner with...8 seats? It's tiny.
Menu's limited but includes hot dogs, burgers, various chopped ham (in combination with pickles, or egg, or etc.) and other basic sandwiches. No fries.
The fluid in which the dogs are cooked apparently contains beer, according to a few folks from work. They certainly have a great "bite" or "snap" when you eat them, as well as good flavor. The buns are the traditional New England style (crust only at top and bottom) that they steam. You can order them "all around" (onions, relish, mustard) or "with everything" (onions, relish, mustard, ketchup).
Although the takeout window does brisk business, I found that the steamed buns quickly got soggy, so I'd recommend gobbling them on the spot.
The only problem with eating them there is that it's all too easy to order more--today, I ended up eating three "all around", then an egg salad sandwich, then another hot dog, this time with everything! I needed a brief post-lunch nap before returning to halfway normal mental function.
The cheeseburger on my last visit was fine. In terms of supergreasy but good burgers, I have an oddly fond memory of the Billy Goat Tavern in Chicago. I think it was the kaiser rolls that the burgers came on.
Anyway, definitely worth a stop.
I also made my way to Eo Noodle on Rt 9 in Framingham. Dan dan noodles good, especially in terms of texture (hand made), though I liked the sauce and other components better at Mary Chung's (at least, I did when I went almost ten years ago). Unfortunately, it's a bit far from the office, and most of the items that looked good seemed as though they'd be better eaten in the restaurant.
Sichuan Garden also on Rt 9 in Framingham continues to please. My new favorite is the beef with hot green pepper lunch special. I hope they add more lunch specials soon, as I will soon have tried every single one.
I think I've located the Indian takeout place in the strip mall on Rt 9--it's near Eo Noodle. Will have to try that soon, especially if it's spicy.
Still, I missed Chacarero so much that I had lunch there on Monday, which is a half-day for me. I drove straight into town, managed to find street parking four blocks away, and waited in line for extra spicy goodness. Mmmmmmm!