Preheat the oven to 400°F. Line a baking sheet with foil and spray with olive oil spray. 

In a shallow dish, whisk the eggs until well combined. In another shallow dish, combine the bread crumbs, parmesan cheese, oregano, garlic powder, salt, and pepper. 

Pat the chicken dry and season with salt and pepper on both sides. One at a time, dip the chicken cutlets into the egg, then into the breadcrumb mixture. Press the breadcrumbs into the chicken to make sure they stick. Place on the baking sheet and repeat with the rest of the chicken cutlets. Spray the top of the chicken with olive oil spray. 

Put the baking sheet in the oven and bake for 8 minutes. Remove from the oven, flip the chicken over, spray with olive oil spray, and return to the oven for an additional 10 minutes until chicken is cooked through and breading is golden brown and crispy. 

Remove chicken from the oven and spoon 1/4 cup of marinara over each piece and place sliced mozzarella on top. Return to the oven on the top rack for 5-7 minutes until the cheese is melted and starting to brown. 

Remove the chicken from the oven.  To serve, place one chicken cutlet in each roll and top with additional marinara sauce if desired.