Jalousies are simple sweet pastries originating from France. They consist of bands of puff pastry filled with either jam or apple purée. They can be large or small. Jalousies are slashed in order to resemble a window shutter or horizontal blinds (also jalousie in French).
Once baked, the pastries are left to cool down to room temperature, and they're then served, sometimes with a scoop of ice cream for the best experience. Nowadays, jalousies are also filled with non-traditional ingredients such as other types of fruit, walnuts, almonds, or mascarpone, and there are even some savory versions filled with potatoes, onions, bacon, and cheese.