"We had this for Thanksgiving 2005 . It was wonderful!..."
INGREDIENTS
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olive oil
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2 large yellow onions, cut in half and sliced
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2 garlic cloves, minced
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1 lb medium round potato, unpeeled
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3/4 lb zucchini
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1 1/4 lbs medium tomatoes
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1 teaspoon kosher salt
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1/2 teaspoon fresh ground black pepper
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1 tablespoon fresh thyme leave, plus extra
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fresh thyme sprig
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2 ounces gruyere cheese, grated