Heat a large skillet, sprayed with avocado or olive oil spray, over medium heat.
Add the ground beef and onion and cook for 8-10 minutes, until no longer pink, breaking up the meat with a sturdy spatula or spoon.
Drain any excess fat or liquid from the pan, if needed, and add the paprika, chili powder, cumin, garlic powder, salt, and pepper. Then add the drained tomatoes and green chilies and stir until mixed. Pour the beef mixture into a dish, cover to keep warm, and set aside.
Add the avocado oil to the skillet. When the oil is hot, add the diced sweet potatoes and the additional ½ tsp coarse salt. Stir the potatoes to coat them well with the oil, cover, and cook for 5-6 minutes, stirring halfway, until the potatoes are starting to soften and brown.
Add the diced bell peppers to the skillet, along with 2-3 tablespoons of water to deglaze the pan and prevent sticking. Stir, cover, and cook 7-10 minutes more, until the potatoes are tender and peppers have softened. I usually stir a few times to prevent the potatoes from sticking to the bottom of the pan.
Reduce the heat to low, add the ground beef mixture back to the skillet, and toss to combine. Season with additional salt and pepper, if desired.
Optional: top with ½ cup freshly shredded sharp cheddar or Colby Jack cheese (shred from the block for optimal melting), then cover with a lid until melted on top. Garnish with fresh parsley, if desired.