Classified Food mod

Hello! This is my first minecraft mod project please give me advice or suggestions that you may! 

The reason i made this mod was to make it so when you are adventuring the world and you stumble across some grass known as *Mystical Grass" You can break it and you will get Classified Food. Now basic classified food such as A or B Will not help you in the slightest but once you get up to the final level which is know as *Food of the gods* You will enjoy the benefits. However it is fairly hard to collect up the amount it takes to get a food of the gods. This keeps it balanced and not a broken mod. Only getting around 1 ClassAFood per chunk maybe a couple more. If you enjoy adventure and running around a lot then this is the mod for you! 

How to craft each Classified Food: 

Class A: Drops from Mystical Grass 

Class B: 3 ClassA On the top row of the crafting table. 

Class C: 3 ClassB On the top row of the crafting table. 

Class D: 3 ClassC On the top row of the crafting table. 

Class E: 3 ClassD On the top row of the crafting table. 

Food Of the gods: 8 ClassE surrounding a diamond in the crafting table