Cook spaghetti according to directions on package and drain.
Warm the tomato sauce in a saucepan over medium heat.
Blend ricotta with hand mixer until smooth and the consistency of sour cream.
Whisk the ricotta cheese into the warm tomato sauce until blended.
Heat sauce until hot, serve over cooked spaghetti.
Sprinkle with mozzarella and parmesan cheese.
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