Slow Cooker Steak Sandwiches

Meat
1 Spray the slow cooker with non-stick cooking spray.
2 Mix the salt, paprika, cumin, garlic, and pepper.
3 Rub on all sides of the meat.
4 Add the meat to the slow cooker.
5 Pour the beer in the slow cooker.
6 Cover and cook for 8 hours on low.
7 Shred the meat and let simmer until ready to use.
Blackened Poblano and Onion
1 Add a little oil to a heavy skillet.
2 Heat until the oil shimmers.
3 Add the onion and poblano and cook, stirring often,  until blackened and soft.
4 Set aside until ready to use.
Sandwiches
1 Slice the sandwich buns in half.
2 Spread with chipotle aioli.
3 Mound the beef on the bun.
4 Cover with cheese.
5 Add cilantro as desired.
6 Top with onions and poblano.