The Spice Of Life Mod 1.12/1.11.2 encourages dietary variety through diminishing returns. Makes it so that eating the same thing over and over will give you fewer and fewer hunger restored each time.
The Spice Of Life Mod

Screenshots:

Tooltip: Food values are shown when holding shift
The-Spice-Of-Life-Mod-1.png
Hunger/saturation HUD overlay: When holding food, the hunger/saturation you’d get from eating it flashes on the screen
The-Spice-Of-Life-Mod-2.gif
Food exhaustion HUD underlay: Food exhaustion gets shown as a progress bar behind the hunger bar
The-Spice-Of-Life-Mod-3.gif
Food Journal: Crafted with wheat + paper
The-Spice-Of-Life-Mod-4.png

Spreadsheet showing the effects of the default settings:

https://docs.google.com/spreadsheets/d/1JR_ayn8a20y36vjmuMflqKQ2RXR5BW6fwNZr1-SYp1s/edit?usp=sharing

Requires:

Minecraft Forge

How to install:

  1. Make sure you have already installed Minecraft Forge.
  2. Locate the minecraft application folder.
    • On windows open Run from the start menu, type %appdata% and click Run.
    • On mac open finder, hold down ALT and click Go then Library in the top menu bar. Open the folder Application Support and look for Minecraft.
  3. Place the mod you have just downloaded (.jar file) into the Mods folder.
  4. When you launch Minecraft and click the mods button you should now see the mod is installed.

The Spice Of Life Mod 1.12/1.11.2 Download Links:

For Minecraft 1.12
Download from Server 1    Link 2