La Bête on Capitol Hill has been doing some globetrotting on Monday nights—first Indian food for a month, now Mexican, who knows what next. Such dilettantism combined with a blatant effort to fill seats on a generally slow night is to be regarded with suspicion; in general, a restaurant ought to stick to what works, especially if it works really, really well, which La Bête’s regular menu does. But La Bête’s Mexican food is just fantastic—the mole, made with duck fat, is truly superlative—and tonight is the last night they’re making it (unless they extend it—please, please, please). (La Bête, 1802 Bellevue Ave,, 5–11 pm)