INGREDIENTS
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2 red bell peppers, stemmed, halved lengthwise and seeded
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3 tablespoons extra-virgin olive oil
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1 leek, white and light-green parts only, finely chopped
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2 cloves garlic, minced
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1 cup chopped fresh parsley
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Kosher salt and freshly ground pepper
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1 2 1/4-to-2 1/2-pound flank steak, trimmed
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1/2 pound sliced provolone cheese (about 8 slices)
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3/4 cup breadcrumbs
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3 teaspoons chopped fresh rosemary
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3 tablespoons chopped fresh parsley
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3 tablespoons drained horseradish
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3 tablespoons extra-virgin olive oil, plus more for brushing
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Kosher salt and freshly ground pepper