Essential Food

Regular 
Transforms food, or any other material, into unbelievably good, filling, and nutritious food. Essential Food does not spoil, and six meals of it weigh only a pound

Duration: Indefinite. 
Cost: 3 per meal if the starting substance is organic material of some kind; 5 per meal if the original substance is totally inedible. 
Time to cast: 30 seconds. 
Prerequisites: Six Food spells, including Create Food.