Ingredients
8 ounces Gemelli pasta
1/2 cup Reserved pasta-cooking water
4 tablespoons Extra virgin olive oil
2 Or 3 large navel oranges, peel and pith removed, separated along membranes
1 cup Thin diagonal slices celery
1 cup Thin vertical slices red onion
1/2 cup Lightly packed, coarsely cut up, tender inside celery leaves
2 tablespoons Fresh lemon juice, or more to taste
8 Kalamata or other brine-cured black olives, pitted, coarsely cut up
1/2 teaspoon Salt
Freshly ground black pepper, to taste
1/3 cup Broken walnuts, toasted in a hot skillet (optional)