Spaghetti Sauce

1 tablespoon olive oil
1 pound Italian sausage links (optional) I prefer the flavor with the Italian sausage in the sauce, and it can be easily removed once the sauce is ready.
4 28oz cans of whole peeled tomatoes (san marzano is best)
1 12oz can tomato paste
4 garlic cloves
1 teaspoon oregano
1 teaspoon basil
1 teaspoon parsley
1 teaspoon onion powder
2 teaspoon garlic powder
1/2 teaspoon celery salt
1 teaspoon pepper
1 teaspoon salt

1. Sear Italian sausage links in a pan cooking most of the way thru and set aside
2. In a 6-8qt pot heat olive oil and sauté onions for 5 minutes
3. Add garlic to the pot and cook for 1 to 2 minutes frequently stirring so garlic doesn't burn
4. Add tomato paste to the pan and cook for 5 minutes
5. Puree or smash whole tomatoes with a potato masher, depending on desired consistency and add to the pot
6. Add seasonings and Italian sausage to the pot and simmer for 3-5 hours stirring occasionally