Gougères (pronounced "goo-ZHAIRS") are a French style of savory pastry made from choux pastry and some type of cheese.
Baking gougères involves baking the pastries in two stages: an initial high-temperature stage which generates the steam which causes the gougères to rise; followed by the second stage at a lower temperature where the gougères finish baking.
Gougères are traditionally made by piping the choux dough through a piping bag to form small balls (similar to the way cream puffs are made). But you can use a spoon, too.
Because they're bite-sized, gougères are often served as hors d'oeuvres. And you can flavor them with herbs.