INGREDIENTS
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1/4 cup (1/2 stick) unsalted butter
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1 medium onion, chopped
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2 garlic cloves, minced
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1/2 teaspoon dry thyme
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1/4 cup tomato paste
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2 cans (28-oz) whole tomatoes
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1–2 teaspoons sugar, divided
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4 cups chicken stock
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1/4 cup heavy cream
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salt, black pepper