Bring a large pot of heavily salted water to the boil. Follow the instructions on the back of the pasta packet for al dente pasta and drain your pasta 2 minutes before the suggested cooking time.
In a large fry pan on a low heat, bring the olive oil slightly to heat. Add the garlic and chili and cook for 3 - 5 minutes or until the garlic is fragrant and soft. Stir the garlic and chili often to avoid it from burning. It’s very important we don’t burn our garlic.
While the pasta is cooking, remove ½ cup of pasta water and combine to the pan with the garlic, chili and olive oil. Leave to simmer for 10 minutes or until all the water has evaporated.
Combine the spaghetti and ¼ cup pasta water to the pan with the sauce and stir through for 1 - 2 minutes on a low heat. Take off the heat and toss through the parsley. Serve immediately.