Slow Cooker Mexican Beef Sliders

Name: Slow Cooker Mexican Beef Sliders
Ingredients: 1 cup low-sodium beef broth; 1 large yellow onion, chopped; 6 cloves garlic, finely chopped; ¼ cup finely chopped chipotle chiles in adobo plus 3 Tbsp. adobo sauce (from 1 can); 1 ½ teaspoons ground cumin; 1 teaspoon dried oregano; 2 ¼ teaspoons kosher salt, divided; 1 3½-lb. boneless beef chuck roast; 4 cups prepared coleslaw mix; ¼ cup packed cilantro leaves; 1 tablespoon olive oil; 1 tablespoon fresh lime juice; 16 slider buns, toasted; ½ cup sliced pickled jalapeños, for serving (optional)