01 - Preheat oven to 425°F and line a baking sheet with parchment paper.
02 - In a large bowl, toss diced potatoes with olive oil, smoked paprika, garlic powder, salt, and black pepper. Spread evenly on the prepared baking sheet.
03 - Roast potatoes for 25 minutes, flipping halfway through, until golden and crispy on the edges.
04 - While potatoes roast, heat a large skillet over medium heat. Add ground beef and cook, breaking up with a spoon, until browned for about 5-6 minutes. Drain excess fat if needed.
05 - Add onion and garlic to the beef; sauté for 2-3 minutes until softened and fragrant.
06 - Stir in taco seasoning, salt, and water. Simmer for 2-3 minutes until the sauce thickens and coats the beef.
07 - Divide roasted potatoes among four bowls. Top each with seasoned taco beef, then arrange cheddar cheese, sour cream, cherry tomatoes, black beans, shredded lettuce, avocado, green onions, cilantro, jalapeño if using, and salsa as desired.
08 - Serve immediately, garnished with extra cilantro and a lime wedge if desired.