Preheat your oven to 300°F (150°C) and line a baking sheet with heavy-duty aluminum foil.
Remove the thin, silvery membrane from the back of the ribs by loosening it with a knife and pulling it off with a paper towel.
In a small bowl, combine the smoked paprika, garlic powder, onion powder, sea salt, and black pepper.
Rub the spice mixture evenly over both sides of the ribs, pressing it into the meat.
Place the ribs on the prepared baking sheet and wrap the foil tightly around them to seal in the moisture.
Bake for 2.5 to 3 hours, or until the meat is tender and starting to pull away from the bone.
While the ribs bake, whisk together the tomato paste, apple cider vinegar, maple syrup, and liquid smoke in a small bowl to create the glaze.
Carefully open the foil, brush the glaze generously over the top of the ribs, and broil for 3-5 minutes until the sauce is bubbly and slightly charred.
Steam the green beans for 5-7 minutes until vibrant and tender-crisp, then serve alongside the ribs.