Traditional American versions of spaghetti call for around 1/2 cup of sauce centred on top of the spaghetti, whereas authentic Italian pasta dishes call for little more than a quarter cup of red spaghetti sauce each serving. As a result, each dish will require anything from 2 to 4 ounces of spaghetti sauce.
For each person, cook at least 2 ounces of dried pasta. If a single person is likely to eat many pieces, take that into consideration when making the sauce and pasta. The less spaghetti used per person, the richer and heartier the sauce. Thinner sauces coat the pasta more easily than chunky sauces, thus they require more pasta and less sauce.
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