Cook the spaghetti in a large pot of boiling salt water until al dente. Drain over a sieve.
Heat a skillet with olive oil. Add garlic and chili pepper, fry for 5 minutes over medium heat. → Avoid frying over high heat! Otherwise, the garlic and chili pepper will burn quickly.
Add drained pasta and ¼ cup of pasta water, toss for one minute. Season with salt and freshly cracked black pepper.
Sprinkle with chopped parsley and, if you like, grated parmesan cheese or this vegan parmesan cheese.
Notes
Keeps fresh for 3 days. Store it in an airtight container in the refrigerator.