Short-term for "Meal, ready-to-eat", a new source of food, able to fully restore all the food bars.
Found in dungeon loot, or crafted using a Plate, Carrot, Potato, and Steak.
Works as any other food item, you hold it in your hand and hold right click and it will fill your food and saturation entirely.
MREs are actually used in the military with the primary purpose to feed soldiers on the go. They have a very long shelf-life and are packed with calories and nutrition to ensure the maximum amount of endurance.