Preheat oven to 375 degrees and spray an 8x10" baking dish with avocado oil or olive oil spray.
Warm oil in a large, nonstick skillet over medium heat.
Add diced chicken and taco seasoning and cook, stirring for 2-3 minutes.
Meanwhile, dice green peppers.
Drain and rinse black beans and tomatoes.
Add bell peppers and cook for 2-3 more minutes with the chicken mixture.
Stir in salsa.
Cook for 2 more minutes with salsa.
Add cream cheese and cook, stirring constantly, until melted and blended.
Stir in beans and tomatoes.
Spoon 1/3 of the chicken mixture into the bottom of the baking dish.
Cover with two tortillas (they will overlap, slightly), top with 1/2 of the remaining chicken mixture and 1/2 cup cheese.
Top with remaining 2 tortillas, chicken mixture and the rest of the cheese.
Cover with foil and bake for 20 minutes.
Remove foil and bake for 10-15 minutes longer until cheese is melted and bubbly.
Serve immediately.