Set up 3 shallow bowls or deep plates to dredge chicken, one with flour, one with eggs and milk, and one with Panko breadcrumbs, almond flour, Parmesan cheese, Italian seasoning, salt, and pepper.
Pre-heat frying pan with 1/8 to 1/4 inch deep cooking oil over medium to medium-high heat. Pre-heat oven to 350 degrees Celsius.
Season chicken breast with additional salt and pepper. Dredge each piece in the flour, then the egg wash, and finally the breading mixture. Place each coated piece of chicken in the pre-heated frying pan and cook until the breading is browned and crispy. Adjust temperature as needed, too low and the breading will soak up the oil, too high and it will burn. Flip chicken and brown the other side.
Remove browned chicken pieces to a baking sheet. Spoon a thin layer of marinara sauce on each piece, and then top with shredded mozzarella and Parmesan cheeses. Bake for about 15 to 20 minutes until chicken is cooked through and cheese is melted.
While chicken is in the oven, cook spaghetti noodles and heat remaining marinara to serve on the side.