Remove the thin membrane from the back of the ribs to ensure the spices penetrate the meat and improve the texture.
In a small bowl, combine the smoked paprika, garlic powder, onion powder, sea salt, black pepper, and chili powder to create a dry rub.
Apply the rub generously to both sides of the ribs, pressing the spices into the meat.
Place the ribs in a smoker preheated to 225°F and cook for approximately 3 to 4 hours until the meat is tender and starts to pull back from the bone.
While the ribs smoke, whisk together the apple cider vinegar, tomato paste, maple syrup, and Dijon mustard in a small saucepan over low heat until the glaze thickens slightly.
During the final 30 minutes of smoking, brush the tangy glaze over the ribs to create a caramelized, sticky exterior.
Steam the green beans in a steamer basket over boiling water for 5 minutes until they are bright green and tender-crisp.
Allow the ribs to rest for 5-10 minutes before slicing and serving alongside the fresh green beans.