For the chicken go with 750 grams to 1 kilo, quarters, breasts, what ever you like, boil or bake to cook, let cool enough to handle and debone if needed, remove skin if needed, and chop to get the cups needed.
Preheat your oven to 180 C. Lightly grease a 9x13 baking dish with butter.
Cook onion and bell pepper in hot oil in a large skillet over medium high heat, about 5 minutes or until tender. Stir in chicken and next 7 ingredients, remove from heat.
Tear tortillas into 1 inch pieces,layer 1/3 of tortilla pieces in bottom of the baking dish, top with 1/3 of the chicken mixture, then top with 1/3 of the cheese. Repeat these same layers 2 more times.
Bake for 30 to 35 minutes or until just beginning to brown on the top.
Serve with a green salad for a complete meal.