Preheat oven to 325.

Sprinkle the meat all over with the salt. Add to a shallow dish, cover and refrigerate for 12 hours and up to 3 days (if you skip this step make sure to salt the meat well before proceeding).

In a large Dutch oven, or roasting pan over two burners, heat the olive oil until hot but not smoking. Add the meat and cook on all sides until very well browned, working in batches if necessary. Remove the meat and allow to drain on a stack of paper towels.

Pour the beer into the pan, scraping to deglaze the bottom, turn off heat. Add the water, cumin, chili powder, cayenne, and smoked paprika. Add the meat back in the pot.

Bake uncovered at 325 until falling apart, about 3-4 hours. Pull into bite sized pieces using a fork.

Add a pizza stone to the oven, increase heat to 425.

In a food processor add the black beans, olive oil and chipotle pepper, process until well combined.

On a lightly floured surface roll out the pizza dough, transfer to a pizza peel that has been well covered with corn meal.

Spread the black bean puree over the pizza in an even layer.

Top with cheese, then carnitas (you will have more than enough, save the remaining meat). Transfer to the pizza stone, bake at 425 until the crust is golden brown, about 12-15 minutes.

Remove from oven, top with tomatoes, cilantro and crema.