Stewed Vegetable Gratin
INGREDIENTS
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3tablespoonsolive oil
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1medium onion, diced
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2stalks celery, diced
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2medium carrots, diced
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114.5-ounce can diced tomatoes
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1teaspoonkosher salt
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1/4teaspoonblack pepper
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1bunch Swiss chard, stems removed and leaves cut crosswise into 1-inch strips
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119-ounce can cannellini beans, rinsed
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1cupplus 2 tablespoons grated Parmesan (about 4 ounces)
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1baguette, ends trimmed
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2tablespoonsfresh thyme leaves
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