Preheat the oven to 200°C (392°F).
Spread tomato sauce evenly over the whole wheat tortilla.
Sprinkle mozzarella cheese evenly.
Slice cherry tomatoes and place them on top.
Add shredded onion and bell pepper.
Drizzle a little olive oil.
Bake in the oven for 8-10 minutes.
Top with fresh basil leaves as desired to finish.