I saw a video a while back about a charity in India and they had this custom.... Structure within a building I suppose you'd call it... Where the sikh folks were cooking up an absolutely gargantuan amount of food. Huge fire had to be lit underneath it. The food pit looked around five meters / 15ft across.

The amounts of everything that went in are somewhat similar to what you're reading in that recipe.

I'm trying to figure out a way to dig it out of the internet because it was a fascinating watch. If I manage it I'll be back. Maybe someone else has seen the video I'm describing and will know where to look.