How did World War II rice crisis give birth to India's Rava Idli?

Rava idli, now a famous South Indian breakfast staple, was born during World War II when rice shortages hit India after Japan invaded Burma. Bengaluru's Mavalli Tiffin Rooms (MTR), then Brahmin Coffee Club, innovated with semolina instead of rice. The wartime substitute became a beloved classic, anchoring breakfast nostalgia across generations and kitchens worldwide.