(Trent Nelson | The Salt Lake Tribune) Santo Taco in Salt Lake City on Monday, May 10, 2021.(Trent Nelson | The Salt Lake Tribune) Ancho chilis at Santo Taco in Salt Lake City on Monday, May 10, 2021.(Trent Nelson | The Salt Lake Tribune) Sergio Castillo at Santo Taco in Salt Lake City on Monday, May 10, 2021.(Trent Nelson | The Salt Lake Tribune) Sergio Castillo cooks Birria Tacos at Santo Taco in Salt Lake City on Monday, May 10, 2021.(Trent Nelson | The Salt Lake Tribune) Birria Tacos at Santo Taco in Salt Lake City on Monday, May 10, 2021.(Trent Nelson | The Salt Lake Tribune) Sergio Castillo cooks Birria Tacos at Santo Taco in Salt Lake City on Monday, May 10, 2021.(Trent Nelson | The Salt Lake Tribune) Santo Taco in Salt Lake City on Monday, May 10, 2021.(Trent Nelson | The Salt Lake Tribune) Sergio Castillo cooks Birria Tacos at Santo Taco in Salt Lake City on Monday, May 10, 2021.(Trent Nelson | The Salt Lake Tribune) Birria Tacos at Santo Taco in Salt Lake City on Monday, May 10, 2021.(Trent Nelson | The Salt Lake Tribune) Birria Tacos at Santo Taco in Salt Lake City on Monday, May 10, 2021.