Place the sweet potatoes in a large mixing bowl. Add the olive oil, smoked paprika, garlic powder, salt, and black pepper.
Toss until the sweet potatoes are evenly coated. Arrange the sweet potatoes on one side of the prepared baking sheet in a single layer.
Bake the sweet potatoes for 10 minutes.
Add the chicken, bell peppers, and onion to the same mixing bowl.
Add the olive oil, chili powder, cumin, smoked paprika, garlic powder, oregano, salt, and black pepper.
Toss until the chicken and vegetables are evenly coated.
Roast for 25 to 30 minutes, turning halfway through, until tender and browned around the edges.
Place a large skillet over medium-high heat. Add 1 tablespoon olive oil to the skillet.
Add the chicken, chili powder, cumin, smoked paprika, garlic powder, oregano, salt, and black pepper. Cook for 5 to 6 minutes, stirring occasionally.
Cook for 5 to 6 minutes, stirring occasionally. Cook for 5 to 7 minutes, stirring occasionally, until the vegetables are crisp-tender and the chicken reaches 165 degrees F.
Add 1 tablespoon lime juice. Stir to coat the chicken and vegetables.
Add the Greek yogurt, lime juice, water, garlic powder, cumin, and salt to a small bowl. Stir until smooth.
Divide the romaine among 4 serving bowls. Add the roasted sweet potatoes, chicken fajita mixture, black beans, corn, and tomatoes.
Sprinkle each bowl with Mexican-blend cheese and cilantro. Drizzle the lime yogurt sauce over each bowl.
Notes
Tips and Tricks
Cut evenly - Keep the sweet potato cubes close to the same size so they become tender at about the same time.Avoid crowding - Spread the chicken and vegetables out so they roast instead of steaming. Use a second baking sheet if needed.Keep the sauce separate - Store the lime yogurt sauce in its own container when preparing the bowls ahead of time.Warm the beans and corn - Heat them before assembling the bowls if you prefer every part of the meal warm.
Storing and Reheating
Refrigerate - Store the chicken, vegetables, sweet potatoes, beans, and corn in an airtight container for up to 4 days. Refrigerate the sauce separately.Reheat in the Microwave - Place one serving in a microwave-safe bowl without the yogurt sauce. Heat until warmed through, then add the sauce and cilantro.Reheat in the Oven - Place the chicken, vegetables, and sweet potatoes on a baking sheet. Warm at 350°F until heated through.