Just about everything that's been mentioned. The pupusa with the relish is very good at La Reyna. Anthony's, Randy Montalbano's. La Morenita on Florida has fresh-made corn tortillas and a salsa/condiment bar - so good. Ham & brie sandwich at Yvette Marie's. Beauregard Gallery and Bistro has excellent soup and huge sandwiches. Fresh Junkie in the Main St. Market does great wraps, as well as the crepe place there and the place at the end with the chicken salad. I miss the Dolce Vita pizza truck downtown so much
Willie's on Cloverland is probably really a hidden gem to most people. I have friends that live a mile away and didn't know it was there. Chicken fried chicken on Fridays is amazing, but I've never had anything from there that wasn't very good at the least.
And this may sound strange, but for people who are new to BR - students or what have you - I wonder if Tony's would be considered a hidden gem. I mean, a lot of people don't venture out that far, and it's definitely a gem.
And now I'm hungry.