Fill large Dutch oven or pot with cold water 3/4 full and bring to a boil. Add 2 teaspoons salt and spaghetti. Separate pasta with tongs a few times during first 2 minutes of cooking. This will ensure spaghetti do not stick together.
Cook pasta uncovered for 5 more minutes or until al dente, stirring occasionally. Taste for doneness while cooking. Do not overcook until too soft. The key to tasty pasta is firm cooked pasta. Drain spaghetti in a colander.
Return pot to medium heat and add olive oil, 4 garlic cloves and oregano. Turn off the heat. Stir constantly for 20 seconds.
Add drained pasta, tomato sauce, remaining 1/2 teaspoon salt, black pepper and 1 garlic clove. Stir gently until warmed through.
Sprinkle with Parmesan cheese and serve immediately.
Video
Notes
Store: Refrigerate spaghetti leftovers in an airtight container for up to 2 days. To reheat, add to a pot with a splash of water or broth and simmer on low heat.
Freeze: Do not freeze. Pasta generally does not freeze well.
Spaghetti: Any pasta will work, whole wheat, whole grain, even gluten free.
How do you know pasta is ready? Remove one piece of pasta on a plate, let cool for 30 seconds and taste. Also if you can easily cut it with a fork, pasta is ready.
Parmesan cheese: Pre-grated Parmesan cheese in a shaker contains cellulose as a filler. Use fresh and real Parmesan.
Why so much salt? It is important to cook spaghetti with salt to prevent pasta from sticking. And to add flavor during cooking.