1Heat 1 inch water (salted if desired) to boiling in 3-quart saucepan. Add green beans. Boil uncovered 6 to 8 minutes or until crisp-tender; drain. Rinse in cold water until chilled; drain.
2Arrange radicchio leaves around edge of serving platter. Mix beans, capers, fennel, boston lettuce and artichoke hearts; place in center of radicchio-lined platter. Mix remaining ingredients; pour over salad.