Preheat your oven to 425°F (220°C).
In a large bowl, toss the diced potatoes with olive oil, garlic powder, onion powder, smoked paprika, salt, and pepper until evenly coated.
Spread the seasoned potatoes in a single layer on a baking sheet lined with parchment paper. Roast them for about 25 to 30 minutes or until crispy and golden, flipping halfway through.
Heat a large skillet over medium-high heat. Add ground beef and cook until browned, about five to seven minutes.
Drain excess fat, then add taco seasoning and water. Stir and let simmer for two to three minutes until thickened.
In another pot, heat black beans and corn over low heat until warmed through.
Assemble bowls with roasted potatoes, seasoned beef, black beans, corn, and cheddar cheese.
Top each bowl with sour cream, cilantro, diced tomatoes, green onions, and jalapeños if desired.
Serve with lime wedges on the side.