Preheat your oven to 400°F. Dice the russet potato into small, uniform cubes and toss them with half of the olive oil and a pinch of sea salt.
Spread the potatoes on a parchment-lined baking sheet and roast for 20 minutes, or until they are golden brown and tender.
While the potatoes roast, prepare the special sauce by whisking together the Greek yogurt, mustard, relish, apple cider vinegar, onion powder, garlic powder, and paprika in a small bowl.
Heat the remaining olive oil in a large skillet over medium-high heat. Add the ground beef, season with the remaining sea salt and black pepper, and cook until fully browned and slightly crispy.
Finely dice the white onion, slice the dill pickles, and shred the romaine lettuce into thin ribbons.
Assemble the power bowl by placing the shredded lettuce at the bottom of a large bowl, then top with the cooked beef and roasted potato cubes.
Add the diced onions and sliced pickles to the bowl, then drizzle the yogurt special sauce over the top.
Finish by garnishing with sesame seeds for that classic flavor profile.