Preheat oven to 375°F. Cook ziti pasta according to package instructions; drain and set aside.

In a skillet, heat olive oil over medium heat. Add minced garlic and sauté until fragrant.

Cook chicken breasts in the skillet until browned and cooked through. Dice into bite-sized pieces.

In a large mixing bowl, combine cooked ziti, chicken, marinara sauce, ricotta, and half of the mozzarella. Mix well.

Transfer mixture into a baking dish. Top with remaining mozzarella cheese.

Bake in the preheated oven for 25-30 minutes until cheese is melted and bubbly.