A recurring food truck at the Street Food Thursdays at MH9, Sabor a Mi, now has a permanent location next to Boxi in Friedrichshain. This Mexican restaurant is serving tacos, quesadillas, sopes (like a super thick tortilla with toppings), tostadas (like a super thin and crispy tortilla with toppings, a.k.a. a giant round chip!) and other corn vehicles to amazing meat and veggie flavour bombs. There's homemade lemonade and Jamaica (Hibiscus), beer, tequila and mezcal, outside seating and a salsa bar (the sauces, not the music). Nothing left to ask for here. 
Grünberger Str. 83, Thu-Fri 16-22, Sat-Sun 12-22