In a large saucepan of boiling water, cook the pasta shells as directed on package. Remove from heat and drain; rinse in cold water. Drain well, arrange the shells on a large microwave safe serving dish. Set aside. In a bowl, combine the feta, red pepper, olives, walnuts, parsley and oregano. Mix well. Fill each pasta shells with about 1 tsp. of the feta cheese mixture. Use a toothpick to skewer each shell. Microwave on medium for 4-5 minutes or until heated through.