" Certain things, he learnt, always go well together. Balsamic vinegar and citrus fruit was just one example. Parsley and onion was another, as was chicory and pork, or radicchio and pancetta. Seafood was a natural partner for zucchini, mozzarella went with lemon, and although tomatoes went with almost anything, they had a special affinity with anchovies, basil or oregano.
"So it's a question of opposites attracting?" he asked.
"Not exactly." She struggled to explain. "Anchovies and tomatoes aren't opposites, really, just complementary. One is sharp, one savory; one is fresh, the other preserved; one lacks salt, while the other has salt in abundance... it's a question of making up for the other one's deficiencies, so that when you combine them you don't make a new taste, but bring out the natural flavors each already has. "

― Anthony Capella , The Wedding Officer: A Novel of Culinary Seduction