noun
substitute food; food substitute
Refers to food used as a replacement for a usual or preferred food, often due to scarcity, dietary restrictions, or emergency situations.
戦時中は米の代用食として芋がよく食べられた。
During the war, potatoes were often eaten as a substitute for rice.
アレルギーのため、小麦
Because of an allergy, I use rice flour as a substitute for wheat flour.