Preheat your oven to 400 degrees Fahrenheit (200 degrees Celsius).
In a mixing bowl, combine the garlic powder with the bread crumbs and beaten egg. Mix it well.
Dip each chicken breast half into the breadcrumb mixture, making sure they are coated evenly.
Take a 13x9-inch baking dish and place the coated chicken breasts in it.
Bake the chicken in the preheated oven for 20-23 minutes until they are cooked through and no longer pink in the center.
Pour one cup of Alfredo sauce evenly over the cooked chicken in the baking dish.
Sprinkle the shredded mozzarella cheese on top of the chicken, followed by the finely chopped tomato.
Place the baking dish back in the oven and bake for an additional 11-13 minutes, or until the chicken edges turn golden brown and the cheese is melted and bubbly. You can check if the chicken is fully cooked by cutting a piece with a knife to make sure there's no pink inside.
While the chicken is baking, heat the remaining Alfredo sauce in a saucepan on medium heat.
Sprinkle the grated Parmesan cheese over the baked chicken.
Once the chicken is done baking, pour the heated Alfredo sauce evenly over the top.
Serve your delicious Alfredo Montamore immediately.
Notes
For an optional serving suggestion, you can place the cooked chicken over a portion of hot-cooked spaghetti before adding the Alfredo sauce and enjoy!