Preheat oven to 400 degrees.
In a small bowl, combine bread crumbs, 2 Tbs. Parmesan cheese, 1 tsp. oregano, salt, and black pepper
Slice tofu into 1/4 inch thick slices and place in bowl of cold water. In a separate bowl beat the egg. One at a time, pat dry tofu slices then coat in egg and press into crumb mixture, turning to coat all sides
Heat oil in a medium skillet over medium heat. Cook tofu slices until crisp on one side. Drizzle with a bit more olive oil, turn, and brown on the other side
Place a thin layer of sauce (approximately 1 cup) in an 8 inch square baking pan. Arrange tofu slices in the pan. Cover with well drained spinach. Pour remaining sauce over tofu and spinach mixture. Top with shredded mozzarella and remaining 3 Tbs. Parmesan.
Bake at 400F for 20 minutes