Cut the cherry tomatoes and mozzarella in smaller pieces. Add pesto and combine until all the tomatoes and mozzarella is covered in pesto. Set aside.
Preheat a grill pan (or regular pan) over medium heat with some olive oil in it.
Combine the ingredients for the flatbread in a bowl and kneed the dough using your hand.
Divide the dough in two if makeing smaller pizzas or keep the dough in one piece if making one pizza.
Add some flour on a flat and clean surface. Flatten the doughs with your hands or with a rolling pin. It should be about 1/2 cm thick.
Add the flatbread pizza to the pan and fry for 2-3 minutes, until grill marks start to form. Flip and fry on the other side.
Place the flatbread pizza crust on a plate and add the tomato/mozzarella topping. Top with arugula, basil and mint.
Serve warm.