Apply binder to beef ribs, season with rub, and smoke at 250°F with cherry wood for 2 1/2 hours.
Place ribs in foil pan with beef stock and tallow, cover, return to smoker until tender (2-3 hours).
Smoke Roma tomatoes, garlic, onion, and poblano peppers for 40 minutes.
Blend smoked vegetables with chipotle peppers, cilantro, lime juice, and salt to make salsa.
Rest smoked beef for 30 minutes, shred, and cover.
Heat griddle to 350°F, char poblano peppers, warm and assemble tortillas with cheese.
Assemble tacos with beef, salsa, optional onion, cilantro, lime juice, and Mexican crème.