Muesli (/ˈmjuːzli/ MEWZ-lee[1][2]) is a cold Swiss breakfast dish, the primary ingredient of which is rolled oats. Traditionally, it is set to soak in water overnight ("overnight oats") and eaten the next morning with fresh fruit, nuts, lemon juice, and cream sweetened with honey. Additional ingredients, such as other grains, seeds, and dried fruits are sometimes added, and other citrus juice may be used.[3] Yogurt, milk or other milk products, or milk substitutes are now commonly added to both homemade and commercially packaged muesli recipes.
Developed around 1900 by Swiss physician Maximilian Bircher-Benner for patients in his hospital,[4] it is has become a common breakfast cereal dish. In Switzerland, it is also consumed for supper as Birchermüesli complet – muesli with Café complet (milk coffee, accompanied by Butterbrot (bread, butter and jam)).[3][5]
In addition to being prepared raw, muesli can be toasted. Muesli can also be processed further by adding sweetener and oil to bind the ingredients together and baked to produce granola.[6][7][8]
Bircher
was invoked but never defined (see the help page).