Preheat your smoker to 225°F using oak or hickory wood for authentic Texas flavor.
Trim excess fat from the brisket and pat dry with paper towels.
In a small bowl, combine sea salt, black pepper, garlic powder, and onion powder; rub the mixture evenly over all sides of the beef.
Place the brisket in the smoker and cook until the internal temperature reaches 165°F, then wrap tightly in butcher paper.
Continue smoking until the internal temperature reaches 203°F, then remove and let rest for at least 30 minutes.
While the meat rests, whisk together tomato paste, apple cider vinegar, coconut aminos, and smoked paprika in a small saucepan over low heat to create the glaze.
Toss green beans with olive oil and roast in a 400°F oven for 12-15 minutes until tender-crisp.
Slice the rested brisket against the grain and serve with a drizzle of the BBQ glaze and the roasted green beans.