Carnitas

Name: Carnitas
Ingredients: 1 ( 3 1/2 - pound /1.6kg) boneless pork shoulder or butt, without the rind; 2 teaspoons kosher salt; 1 teaspoon ground black pepper; 1 teaspoon ground cumin; 2 large white onions , divided; 3 tablespoons olive oil; 1/2 cup orange juice; 1/2 cup dark beer; 1 bay leaf; 3 cups fresh cilantro, leaves and stems, roughly chopped, divided; 4 limes, for serving; 20 corn tortillas, for serving; 2 cups salsa , for serving