Pat the chicken breast dry and season evenly with cumin, smoked paprika, garlic powder, salt, and pepper.
Heat olive oil in a large non-stick skillet over medium-high heat.
Add chicken strips to the skillet and cook for 6 to 8 minutes, turning occasionally until fully cooked to an internal temperature of 165°F (74°C). Remove chicken and set aside.
In the same skillet, add the bell peppers and onions, sautéing for 5 minutes until tender-crisp.
In a separate small saucepan over low heat, combine the chicken broth and Greek yogurt, whisking until smooth.
Gradually stir in the shredded cheddar cheese until fully melted and incorporated. Do not allow the sauce to boil to prevent curdling.
Stir the diced jalapeños into the cheese sauce.
Return the chicken to the skillet with the vegetables and toss to combine.
Portion the chicken and vegetable mixture into four servings and pour the cheese sauce over each portion immediately.