Start by finely dicing bell peppers and onion. I find a food processor is an easy and quick way to do this.
In a large skillet, heat a little oil and saute the onion and peppers for about 10 minutes until soft.
Add the garlic and seasoing with 1tsp salt and 1/2 tsp pepper. Cook for a minute.
Add the chicken and break it apart with a spatula. Cook for 10 minutes.
Stir in crushed tomatoes. Let the filling cook for about 5 - 10 more minutes, until the chicken is cooked through.
Prep the toppings and warm the tortillas while the chicken is cooking.
Assemble tacos and enjoy!