Bring a medium pot of heavily salted water to a boil over high heat. Cook pasta according to the package directions, or until al dente. Drain, then rinse under cold water until cool.
Transfer pasta to a large bowl and add mozzarella, spinach, olives, and Parmesan. Toss to combine.
In a separate, nonreactive bowl, combine vinegar, salt, and pepper. While whisking constantly, slowly add oil by pouring in a thin stream down the side of the bowl. Whisk until completely incorporated.
Pour vinaigrette over salad and toss until pasta is coated. Taste, adjust seasoning as desired, and serve.
Beverage pairing:Antonopoulos Mantinia Moschofilero, Greece. Spinach and olives are hallmarks of the Mediterranean, so a crisp white from the same region makes sense. Moschofilero is a wonderful wine from Greece, blending fine, firm acidity with a round, medium body and just the kind of bright citrus, herb, and apple flavors that go wonderfully with spinach and olives.