Twelfth Night, the refreshingly new ensemble of young stars directed by violinist Rachell Ellen Wong and harpsichordist David Belkovski, offers an all-Handel program featuring Aminta e Fillide, a pastoral cantata. Singers Jessica Niles and Xenia Puskarz Thomas, the cantata’s nymph and shepherd, pursue each other through a mythological Greek landscape in arias both virtuosic and poignant. To round out a captivating program, the instrumentalists perform trio sonatas and the “Chaconne” from Handel’s opera, Terpsichore.