Best hole-in-the-wall eatery in Washington DC?

Tonic

La Lomita Dos

Alladin's Eatery Great Middle Eastern fare in Arlington

Osman & Joe's Steak 'n Egg Kitchen If you want a hole in the wall, hit the Steak and Egg. Get a giant plate of pancakes (I suggest the ones with Reese's Pieces), plus hash browns and biscuits. And a milkshake. Greasy but oh so good.

Thai Tanic

The Saloon on U Street...Best Grilled Cheese

Awesome (and authentic) Brazillian food at Grill from Ipanema (http://www.thegrillfromipanema.com/). Highly recommended!

Oohh's & Aahhs for great soul food. Unreal wings, sweet potatoes, and mac n cheese. Gets insanely pricey on the weekends for a meal after all the bars close, but during the week it's great.

Adam Express. A tiny Korean hidden gem in Mount Pleasant that you will miss if you so much as blink. It looks pretty grungy from the outside, but I promise it is soooo good. The bi bim bap and Chicken Kan Pun Gi are my recommendations.

Lalibela. Best Ethiopian I've ever had and gosh darn cheap too. It isn't a whole lot to look at, but sit on the patio if you can - good 14th & P St, NW people watching. The tomato salad, simple and really frigging good. I'm told that it's even better than Zed's. Oh, and honey wine - really awesome after a crappy day at work. Or really any day and time it's good... I'm a fan of the kitfo (raw beef) - think carpaccio with kick and a bit mushy that you grab with special bread... And anything with lentils or potatoes involved is homey and good here. You can adjust the hotness of everything too, so you won't hurt yourself. Happens to be the perfect place to catch the DC Pride Parade - food, drink and half naked gay boys. And the second runner up for me is Well-Dressed Burrito. For reals a hole in the wall. Down an alley even! Everything is cheap, ginormous, fresh and yummy. They cater too I think...