Combine first 10 ingredients in a large bowl; stir well. Set aside.
Cook pasta in boiling salted water according to package directions; drain. Cool pasta under running water; drain well.
Add pasta and next 3 ingredients to buttermilk dressing in bowl; toss well. Sprinkle with pepper.
*Ricotta salata is a firm sheep's milk cheese available at import markets. If it's unavailable, substitute crumbled feta.