INGREDIENTS
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1 medium onion, chopped
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1 medium carrot, chopped
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1 stalk of celery, chopped
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Olive oil
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White wine
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A few canned tomatoes, squeezed through your fingers
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A ladleful of homemade broth
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Leftover boiled beef, cut into bite-sized pieces
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Optional: A bay leaf and/or a pinch of red pepper flakes