01 - Preheat oven to 425°F. Line a large baking sheet with parchment paper for easy cleanup.
02 - Place diced potatoes in a large bowl. Add olive oil, smoked paprika, garlic powder, salt, and black pepper. Toss thoroughly until potatoes are evenly coated with spices.
03 - Spread seasoned potatoes in a single layer on the prepared baking sheet. Roast for 25 to 30 minutes, tossing halfway through cooking, until golden brown and crispy on the edges.
04 - While potatoes roast, heat 1 tablespoon olive oil in a large skillet over medium heat. Add diced onion and sauté for 2 to 3 minutes until softened and translucent.
05 - Add minced garlic to the skillet and cook for 30 seconds until fragrant. Add ground beef, breaking it apart with a wooden spoon. Cook for 5 to 7 minutes until fully browned.
06 - Stir in chili powder, cumin, oregano, smoked paprika, salt, and cayenne pepper. Cook for 1 minute, stirring constantly, until spices are fragrant and well distributed.
07 - Pour in tomato sauce and water. Reduce heat to low and simmer for 5 minutes, stirring occasionally, until mixture thickens slightly. Remove from heat and set aside.
08 - In a small bowl, whisk together sour cream, lime juice, ground cumin, and a pinch of salt until smooth and well combined. Adjust seasoning to taste.
09 - Divide roasted potatoes evenly among 4 serving bowls. Layer with taco beef, cheddar cheese, cherry tomatoes, lettuce, black beans, corn, avocado, green onions, and cilantro.
10 - Drizzle each bowl generously with zesty lime crema. Serve immediately while potatoes are still crispy and beef is warm.