According to Wikipedia, "Calissons" are a traditional French candy consisting of a pale yellow, homogeneous paste of candied fruit and ground almonds topped with a thin layer of royal icing (white). It became a tradition in Provence (region on the south of France) from the 16th century. Since I love Provence, here is a quick representation of a calisson.

To make this piece, I used yellow filament and at 85% of progress, I changed the filament to use a white one (for the icing). For more realistic dimensions, use a length of 4-6 cm (you may need to resize the piece).

Bon appétit!