At National Gallery, Mendelssohn Piano Trio offers sumptuous romantic feast

Take some sweeping passion and a bit of soaring ecstasy, add a dash of heart-rending despair, season with heaving breasts and sighing melodies, then mix it all together with impeccable elegance and taste -- that's romantic-era music at its best, and the National Gallery of Art was awash in the stuff Sunday night, when the fine young Mendelssohn Piano Trio presented a program so lush, substantial and richly flavored you wanted to eat it with a knife and fork.