In the meantime, prepare the chicken.
Heat olive oil in a frying pan and add cubed chicken; cook for 3 to 4 minutes, or until browned on all sides and thoroughly cooked. Remove from heat.
Drain pasta and return to pan.
Stir in prepared chicken and spinach pesto; mix until well combined.
Transfer to previously prepared baking dish.
Top with cherry tomatoes and layer 1/2-cup mozzarella cheese.
Bake for 18 minutes; remove from oven and top with remaining mozzarella cheese.
Bake for 3 to 4 minutes, or until cheese is melted.
Remove from oven and let stand few minutes.
Sprinkle with grated parmesan cheese and serve.