Preheat the oven to 400 degrees Fahrenheit. Line a baking sheet with aluminum foil and set aside.
In a small saucepan, warm the marinara sauce over low heat until ready to use.
2 cups marinara sauce
In a shallow container, mix the flour, salt, pepper, onion powder, and garlic powder.
½ cup all purpose flour, 2 teaspoons kosher salt, ½ teaspoon black pepper, 1 teaspoon onion powder, ½ teaspoon garlic powder
In a separate bowl, crack the eggs and beat lightly with a fork.
2 eggs
Pour the breadcrumbs into a separate shallow bowl.
1 cup Italian seasoned panko breadcrumbs
Pat the chicken breasts dry with a paper towel. Dip each first in the flour mixture, then the eggs, ending in the breadcrumbs. Gently push into the breadcrumbs to make sure they stick to the surface. Place on a plate until you are ready to fry them.
2 large chicken breasts
In a deep pan, bring the canola oil up to a medium heat. To test to see if the oil is ready, throw a pinch of flour in to make sure it sizzles.
2 cups canola or vegetable oil
Fry the breaded chicken until golden brown, about 3 minutes per side. Remove to a paper towel lined plate.
Place the baguettes, sliced side up on the sheet pan. Drizzle with the olive oil. Place in the oven and bake until the bread is just lightly toasted, about 2 minutes.
1 French baguette, 2 Tablespoons olive oil
Top the bottom half of the baguette with the fried chicken, shingling them if necessary. Spread a small amount of the marinara along the top side of the baguette. Spread the rest over the chicken slices, then top with the basil.
6 large basil leaves
Sprinkle the cheese on the top and the bottom slices, then bake again until the cheese is completely melted and the sandwich is hot, about 6 to 7 minutes.
1 ½ cups mozzarella cheese
Let cool slightly then place the top slice on the bottom. Slice into six pieces with a serrated knife and serve.