I believe the word "sauce" is a non-count noun, but why do some people say "a tomato sauce"? Here are the examples: This is the best base for a tomato sauce. The lasagna that had mushrooms, onions, garlic, and a bechamel sauce.
Top answer
It stresses a particular type or variety of sauce.
— AlpheccaStars
It stresses a particular type or variety of sauce.
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