INGREDIENTS
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1 tablespoon plus 1/4 teaspoon salt
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8 ounces uncooked farfalle pasta
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2 tablespoons extra-virgin olive oil, divided
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1 cup vertically sliced yellow onion
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1 teaspoon dried oregano
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5 garlic cloves, sliced
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2 cups grape tomatoes, halved
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1 tablespoon white wine vinegar
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3 cups baby spinach
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3 tablespoons shaved fresh Parmigiano-Reggiano cheese
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1/4 teaspoon freshly ground black pepper
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3/4 cup (3 ounces) crumbled feta cheese