INGREDIENTS
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6 tablespoons EVOO – Extra Virgin Olive Oil, divided
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3 medium (about 1 pound) yellow- or white-skinned potatoes, sliced 1/4-inch thick
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Salt and pepper
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4 cloves garlic, sliced
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1 small onion, quartered and thinly sliced
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2 firm zucchini, seeded (if necessary) and sliced 1/4-inch thick
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2 tablespoons thyme, chopped
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1 28-ounce can San Marzano tomatoes, crushed by hand
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A few leaves of basil, torn
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2 medium leeks, thin half moons
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10 to 12 artichoke hearts from 2 boxes, defrosted, patted dry and sliced or if fresh, thinly sliced and dressed in lemon juice
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1/4 cup parsley chopped
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2 to 3 ribs celery with leafy tops, thinly sliced
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1 quart chicken or vegetable stock
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1 chunk rind Parmigiano-Reggiano, plus some to top soup
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1/2 to 3/4 pound cremini mushrooms, sliced