Preheat the oven to 400 degrees. Place the flatbread on a parchment-lined baking sheet.
Spread crushed tomatoes on top of the bread. Sprinkle with chopped garlic. Salt and pepper lightly.
Sprinkle cheese, bell pepper, and mushrooms on top. Drizzle with extra-virgin olive oil. Salt and pepper lightly.
Bake for 15-20 minutes, or just until the cheese begins to bubble and turn golden around the edges. Remove and cool slightly. Garnish with fresh chopped basil. Enjoy!