Pre-heat a large skillet on medium-high heat and lightly spray with olive oil cooking spray.
Cook the chicken and then add the taco seasoning. Optional to add ¼ cup of water depending on how watery your chicken is cooked through, internal temperature of 165 F (74 C). Set aside.
In the same pan, add more olive oil cooking spray and sauté the bell pepper and onion until they are softened. 3-5 minutes.
Add the chicken back into the pan. Then add 1 cup of the enchilada sauce. Stir until combined.
Place mixture in the center of each tortilla, top with cheese and roll tightly.
Lightly spray the same pan with cooking spray and place the rolled enchiladas seam-side down. Flip and cook the other side until golden brown.
Place enchiladas into meal prep containers and spoon the remaining enchilada sauce and a dollop of Greek yogurt on top.