The Met: Live in HD will present a simulcast of Bartlett Sher’s new production of Donizetti’s comic opera “L’Elisir d’Amore” on Saturday at noon at Guild Hall. One of the most consistently popular operatic comedies since its premiere in Milan in 1832, the story centers on Nemorino, played by Matthew Polenzani, who is in love with Adina (Pretty Yende), who torments him with her indifference. Nemorino hopes a traveling quack’s love potion — the elixir of love — will answer his prayers.