Preheat your oven to 400°F and dice the Russet potato into small half-inch cubes.
Toss the potato cubes with 0.25 tbsp of olive oil and a portion of the sea salt on a parchment-lined baking sheet, then roast for 20 minutes until golden and tender.
While the potatoes roast, heat a large skillet over medium-high heat with the remaining 0.25 tbsp of olive oil.
Add the ground beef to the skillet, breaking it apart with a spatula, and cook until fully browned and no pink remains.
Season the cooked beef with the remaining sea salt and black pepper.
In a small mixing bowl, whisk together the Greek yogurt, yellow mustard, apple cider vinegar, garlic powder, onion powder, and smoked paprika until smooth to create the special sauce.
Finely chop the romaine lettuce, white onion, and dill pickles into small pieces.
Assemble the bowl by placing the shredded lettuce at the base, followed by the warm ground beef and roasted potato cubes.
Garnish with the diced onion, pickles, and sesame seeds, then drizzle the creamy special sauce over the entire bowl before serving.