Preheat your oven to 400°F and line a small baking sheet with parchment paper.
Dice the russet potato into small half-inch cubes, toss with half of the olive oil and a pinch of salt, then roast for 20 minutes until golden and crisp.
While the potatoes roast, heat the remaining olive oil in a skillet over medium-high heat and add the ground beef.
Season the beef with half of the sea salt and black pepper, cooking until browned and crumbled through.
In a small mixing bowl, whisk together the Greek yogurt, yellow mustard, pickle juice, garlic powder, onion powder, and smoked paprika to create the special sauce.
Prepare the bowl base by shredding the romaine lettuce and finely dicing the white onion and dill pickles.
Assemble the bowl by layering the lettuce, roasted potatoes, and cooked beef, then topping with onions, pickles, and shredded cheddar.
Drizzle the creamy special sauce over the bowl and garnish with sesame seeds before serving.