It looks like a simple tomato and herb sauce. Vodka is a liquor valued for being flavorless and odorless. What does it contribute to a tomato sauce?
In: Chemistry
Partially, its a lot of buzz. But, vodka (and alcohol in general) helps bring out volitile flavors. So flavors that may be harder to taste otherwise, vodka and other alcohol makes easier to taste, changing the flavor in a pleasant way.
Many recipies use wine and other alcohol to a similar effect with more flavor from the alcohol itself. Vodka is a stronger alcohol and achieves the effect better, without adding any other flavors.
It also typically contains cream, making it richer and different.
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