Although I am a Vegetarian and cannot fully appreciate the offerings from the 2 new restaurants opened in Pilsen, I thought the Board would like the info.
Salvadoran Pupuseria (along with some Salvadoran platillos featuring Carne, Pollo and Mariscos) at 1700 Block of W. 18th Street. I had their vegetarian Pupusas and a Corn Tamale. The pupusas were slightly better than the ones I had from Maxwell St. Plus they have a Vegetable filling pupusa.

The Corn Tamale was sweet. Maybe that was from using sweet corn or added sugar, I don't know. But that is something I won't be getting again.
There is an Argentinian restaurant opened on the 1400 block of W. !8th called
"Chimichurri". It says Steak and Pizza on the sign. So I don't know how 'authentic' this will turn out. It does say "Argentinian Cuiusine" on the entrance.
Add to this the new "tamale" place on 900 Block of W 18th (that is being touted as a Hot Doug's of tamales) and a new sweet baked goods place on 1800 block of S. Halsted the offerings have started to reflect the changing demographic.