Spread tomato sauce evenly over the whole wheat tortilla.
Add sliced onion, bell pepper, mushrooms, and cherry tomatoes on top.
Cut chicken breast into bite-sized pieces and place on top.
Sprinkle mozzarella cheese.
Lightly coat a pan with cooking oil and preheat over low heat.
Place the prepared tortilla pizza in the pan, cover with a lid, and cook for 5-7 minutes until the cheese melts.
Finish by topping with basil or pepper to taste.