tear ancho chiles into pieces. discard seeds and stems.
in large pot/dutch oven, toast chiles over medium-high heat for 3-4mins. stir occasionally
transfer chiles to food processor and process until very finely ground. set aside.
4 add oil to pot and heat over medium-high heat.
add ground beef. stirring ocasionally until well browned. (about 6mins)
using slotted spoon transfer to a plate and set aside.
.add onion to pot and cook briefly over medium-high. about 2mins
use garlic press and press directly into pot 1 clove at a time.
Stir in jalapenos, oregano, cumin, cayenne pepper, and tomato paste.
stir and cook until fragrant. (about 2mins)
add beer and continue to cook. stirring and scraping the pan. (about 7mins)
Meanwhile put beans in a large bowl and mash briefly w/ potato masher. Not fully mashed.
add beans, stock, tomatoes, salt, and cooked beef.
cover and bring to a simmer.
reduce heat to low to maintain simmer and cook 2 hours. so everything gets to know each other in the pot.
remove from heat, uncover and let stand at least 1hour. (can refrigerate 8hours overnight)
reheat gently, taste and add salt if necessary. Serve with toppings as desired.