| http://www.w3.org/ns/prov#value | - Servings: 4 Ingredients 3 tablespoons olive oil 1 small onion, finely diced (3/4 cup) 1 large tart apple, such as Granny Smith, peeled, cored and cut into 1/4-inch dice 1 tablespoon maple syrup, or more to taste Kosher salt Freshly ground black pepper 3 tablespoons apple cider vinegar About 10 ounces fresh baby spinach 6 thin slices prosciutto di parma (about 3 ounces total) 1/3 cup chopped toaste
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