FOR THE PORK
1 ½ teaspoons whole coriander seed
1 ½ teaspoons whole cumin seed
1 ½ teaspoons black peppercorns
2 ¼ teaspoons coarse kosher salt
1 ½ teaspoons dry mustard powder
1 ½ teaspoons chile powder
3 tablespoons dark brown sugar
3 ½ pounds boneless pork shoulder
Hamburger or brioche buns, for serving

FOR THE BARBECUE SAUCE
1 ½ cups ketchup
¼ cup packed dark brown sugar
2 tablespoons molasses
2 garlic cloves, minced or grated
¼ cup cider vinegar
2 tablespoons Worcestershire sauce
2 teaspoons sweet or hot paprika
1 teaspoon black pepper
1 teaspoon dry mustard powder
Pinch of cayenne
Dash of hot sauce, more to taste

FOR THE SLAW
1 small head green cabbage, outer leaves removed, shredded (about 1 1/2 pounds)
½ small red onion, thinly sliced
1 large jalapeño, seeded if desired, thinly sliced
¾ cup mayonnaise
2 tablespoons cider vinegar
2 tablespoons extra-virgin olive oil
1 teaspoon coarse kosher salt
Black pepper