Preheat oven to 350F degrees.
Place the cooked spaghetti in a bowl and coat with 1 tablespoon of olive oil.
Combine the eggs and 1/4 cup Parmesan cheese in a bowl. Add the mixture to the spaghetti and stir to mix well.
Place the spaghetti mixture into a greased deep-dish pie plate and spread to make a “pie crust”.
Heat 1 tablespoon of the oil in a sauté pan over medium heat. Add the garlic, onions, red bell peppers, carrots, celery, salt and sauté for 5 minutes, until soft.
Pour the tomato sauce over the vegetables and stir to combine.
In a bowl stir together the ricotta cheese, the remaining 1/4 cup of Parmesan cheese and Italian herbs to combine.
Spread the Ricotta/Parmesan cheese mixture over the pasta, then layer the vegetable mixture and finally, top with the mozzarella.
Place dish on a sheet pan and bake for 30 minutes.
Cool, cut into wedges and serve.