Heat oil in heavy skillet over medium heat. Sprinkle chicken with salt and pepper. Cook chicken, onion and garlic over medium heat until chicken is cooked through (about 6 minutes), stirring occasionally. Drain. Stir in artichoke hearts, peppers and olives. Cook over medium-low heat, until heated through (about 6 minutes). Meanwhile cook pasta in boiling salted water according to package directions until almost tender; drain. Transfer pasta to heated serving platter. Toss in Parmesan cheese and chicken mixture. Serve immediately.