1. Cook pasta to desired doneness as directed on package, adding peas during last 5 minutes of cooking time. Drain; rinse with cold water to cool.
2. In very large bowl, combine cooked pasta and peas, tuna, and pimientos; mix well.
3. In food processor bowl, combine all remainining ingredients; process 2-3 minutes or until mixture is creamy and feta is finely chopped. Add to pasta mixture; mix well to coat. Serve immediately, or cover and refrigerate until serving time.
Makes 10 (1 1/2 cup) servings.