INGREDIENTS
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2 tablespoons extra-virgin olive oil
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1 small zucchini, finely diced
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1 red bell pepper, finely diced
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1 yellow bell pepper, finely diced
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5 cloves garlic, smashed to a paste with coarse salt
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1/2 teaspoon red pepper flakes
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Kosher salt and freshly ground pepper
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1 large egg, lightly beaten
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1 tablespoon finely chopped fresh thyme
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1/4 cup chopped fresh parsley
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1 1/2 pounds ground turkey (90 percent lean)
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1 cup panko (coarse Japanese breadcrumbs)
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1/2 cup freshly grated Romano or Parmesan cheese
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3/4 cup ketchup
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1/4 cup plus 2 tablespoons balsamic vinegar