INGREDIENTS
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1 tablespoon olive oil
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1 tablespoon butter
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1 large onion, chopped
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1 large clove garlic, minced
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2 ribs celery, chopped
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1 tablespoon all-purpose flour
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5 large super-ripe tomatoes (about 4 pounds), coarsely chopped
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1 teaspoon sugar 4 leaves fresh basil + 1 tablespoon chopped
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¾ teaspoon salt ⅛ teaspoon ground black pepper
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Pinch of ground cayenne (optional)
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4 Panera Bread Sourdough Rolls, warmed