At its heart, no matter how much we're inspired to show off, potlucks are casual affairs that ought to recall long ago good times. Nothing quite does that like a warm fruit dessert, topped with a scoop of vanilla ice cream. Way back when, the ice cream would likely have been homemade (probably one of the host family's contributions to the communal feast), but today, with supermarket freezers stocked full of superpremium brands, store-bought is more than acceptable. Make this golden, biscuit-topped apricot cobbler when the summery fruit is at its best and you'll earn raves.