Prep: Preheat oven to 375°F. Grease 9x13 baking dish.
Cook pasta: Boil ziti 2 minutes LESS than package directions. Drain, toss with olive oil.
Make filling: Mix ricotta, egg, 1 cup mozzarella, ½ cup Parmesan, herbs, garlic, seasonings until combined.
Combine: Add pasta and 3 cups marinara to ricotta mixture. Fold gently until coated.
First layer: Pour half pasta mixture into dish. Spread evenly.
Sauce layer: Spoon half remaining marinara over pasta layer.
Second layer: Add remaining pasta mixture. Spread and press gently.
Top: Spoon remaining marinara over top. Sprinkle with remaining mozzarella and Parmesan.
Bake covered: Cover with foil (don't touch cheese). Bake 30 minutes.
Uncover: Remove foil, bake 15-20 minutes until golden and bubbly.
Rest: Let stand 10 minutes before serving. Garnish with basil.