01 - Heat 2 tablespoons olive oil in a medium saucepan over medium heat. Add minced garlic and cook for 30 seconds until fragrant. Stir in crushed tomatoes, oregano, basil, sugar, salt, and black pepper. Simmer uncovered for 20 minutes, stirring occasionally. Adjust seasoning to taste.
02 - Place chicken breasts between two sheets of plastic wrap and pound to an even ½-inch thickness. Season both sides with salt and black pepper.
03 - Arrange three shallow bowls: one with flour, one with beaten eggs and milk, and one with a breadcrumb mixture combining panko, Parmesan, Italian herbs, garlic powder, salt, and pepper.
04 - Dredge each chicken breast in flour, shaking off excess. Dip into the egg mixture, then coat thoroughly with the breadcrumb mixture.
05 - Heat olive oil in a large skillet over medium-high heat. Fry chicken breasts in batches for 3–4 minutes per side until golden brown and cooked through. Transfer to a paper towel–lined plate to drain.
06 - Preheat oven to 400°F. Place fried chicken breasts on a baking sheet. Spoon marinara sauce over each piece, then top with shredded mozzarella and additional Parmesan. Bake for 10 minutes until cheese is melted and bubbly.
07 - Meanwhile, cook spaghetti in a large pot of salted boiling water according to package instructions until al dente. Drain well.
08 - Divide spaghetti onto plates, ladle with marinara sauce, and top with a chicken breast. Garnish with fresh basil or parsley if desired.