Fastfood used to be a plugin on bukkit. It was used by many and was very useful. It made food instantly heal player's hearts based on their heal values described in the configs. I have recreated this plugin, although it only contains some foods, I do plan to update it further to include all the editable items in minecraft.
HealValues: STEAK: 2.0 PORK: 2.0 CARROT: 2.0 APPLE: 2.0 STEW: 4.0 CHICKEN: 4.0 BAKED_POTATO: 2.0 CAKE: 6.0 PUMP_PIE: 6.0 COOKIE: .5 FISH: 2.0 MELON: 1.0 BREAD: 2.0