In a large skillet, heat the olive oil over medium heat. Add the cubed chicken and cook until browned and cooked through, about 5-7 minutes. Season with salt and pepper to taste.
Add the diced onion, minced garlic, and diced bell pepper to the skillet. Sauté for 3-4 minutes, or until the vegetables are softened.
Stir in the diced tomatoes, green chilies, chili powder, cumin, and smoked paprika. Cook for another 2-3 minutes, allowing the flavors to meld together.
Increase the heat slightly and sprinkle the shredded cheese over the mixture. Cover the skillet with a lid for 2-3 minutes, or until the cheese is melted and bubbly.
Remove the skillet from the heat and serve hot, topped with a dollop of sour cream and fresh cilantro.
Notes
Serve with sour cream and fresh cilantro for added flavor.