Cook pasta in salted boiling water until al dente. Drain. Set aside. Spread a moderate layer of pasta sauce (1/3 cup) on the bottom of a glass or ceramic baking dish. (Keeps it from sticking) Mix the remaining ? cups pasta sauce, 1 cup ricotta, 1 egg, parmesan cheese, and ½ cup mozzarella. Add black pepper to taste, and mix in garlic powder and onion powder. Mix the pasta with the cheese mixture, then spread half the pasta over the pasta sauce in the pan. Add a layer of spinach, using all the spinach. Sprinkle a little bit of mozzarella on top of the spinach. Spread the other half of pasta on top of the spinach layer. Sprinkle the remaining mozzarella cheese on top as a nice layer that keeps all the moisture from the pasta from baking out. Bake in the oven at 350F for about 30 minutes until the cheese has melted.