Caramelize the onions
15 minCook the finely chopped onion in olive oil over low heat for 15 minutes, until deep golden brown.
This sauce combines slowly caramelized onions with tomatoes and is ideal for using up leftover onions and tomatoes. It adds rich flavor to many dishes, from pasta to grilled meats.
Cook the finely chopped onion in olive oil over low heat for 15 minutes, until deep golden brown.
Add the grated tomatoes, tomato paste, and garlic. Cook for 10 minutes more.
Add the sugar, thyme, salt, and black pepper. Simmer for 5 minutes more, until the sauce thickens.
Cook the onions slowly over low heat; rushing them over high heat can make them burn and taste bitter.
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