INGREDIENTS
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olive oil, for cooking
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1 onion, chopped
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1-2 celery stalks, chopped (with leaves, if there are any)
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1-2 carrots, chopped
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1-2 garlic cloves, crushed
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salt and pepper
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3-4 cups (a 1 L carton works well) chicken or veg stock
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1 14 oz (398 mL) can diced or whole plum tomatoes, with their juice
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2 cups canned or cooked navy or white kidney (cannellini) beans (one 19 oz/540 mL can)
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1 thin-skinned potato, diced (optional)
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a couple sprigs of rosemary and/or thyme
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1 small bunch (or a few large leaves) kale, thinly sliced (discard the stems)
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thick, crusty day-old bread
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grated Parmesan, aged Gouda or cheddar