Preheat oven to 375°F and lightly grease a small baking dish.
Dice the chicken breast, bell pepper, and onion into small, bite-sized pieces.
Heat olive oil in a skillet over medium heat and sauté the chicken and vegetables until the chicken is golden and cooked through.
In a small bowl, whisk together the Greek yogurt, lime juice, chili powder, cumin, garlic powder, salt, and pepper until smooth.
Stir two tablespoons of the creamy sauce into the skillet with the chicken and vegetables to coat them.
Divide the chicken mixture evenly between the two corn tortillas, roll them up tightly, and place them seam-side down in the baking dish.
Spread the remaining chili-lime sauce over the top of the tortillas and sprinkle with the shredded cheddar cheese.
Bake for 12-15 minutes until the cheese is melted and the edges are slightly crisp.
Garnish with fresh cilantro before serving.