Preheat your oven to 400°F and line a small baking sheet with parchment paper for easy cleanup.
Dice the russet potato into small half-inch cubes to ensure they get maximum crispiness in the oven.
Toss the potato cubes with olive oil, half of the smoked paprika, and the sea salt on the prepared baking sheet.
Roast the potatoes for 20 to 25 minutes, flipping halfway through, until they are golden brown and crispy.
While the potatoes roast, season the ground beef with the remaining smoked paprika, garlic powder, and black pepper.
Heat a grill pan or cast-iron skillet over medium-high heat and cook the beef until browned and cooked through.
Chop the romaine lettuce into bite-sized pieces and place them in a large bowl as your base.
Thinly slice the red onion and halve the cherry tomatoes to add fresh volume and color to the bowl.
Layer the grilled beef and crispy roasted potatoes over the lettuce and fresh vegetables.
Finish the bowl with a drizzle of yellow mustard for a tangy, clean-eating condiment kick.