In a large skillet over medium high heat, saute
chicken and onion in oil until cooked through and no longer pink
inside. Add taco
seasoning, beans, corn, salsa and a little water to prevent drying out.
Cover skillet and simmer over medium low heat for 10 minutes.
Preheat oven to 350 degrees F (175 degrees C).
In a 9×13 inch baking dish, place a layer or two
of tortilla chips (whole) in bottom. Pour chicken mixture on top, then
top with 1 cup of cheese and a layer of crushed tortilla chips.
Bake in the preheated oven for 15 minutes. Add
remaining cup of cheese and bake until cheese is melted and bubbly (5-10mins).