In meez, any action you take on an ingredient that will alter it's yield or the conversion from weight to volume from it's original raw state is a prep action.
meez includes these prep actions built into your database from the start. You can also customize them if you like.
There are often times when you do not need a prep action if it is just a note about the ingredient but does not affect it's yield or conversion. In this case, you'll use the 'notes' section to the right of the ingredient line in a recipe
For example: Your ingredient may be 'Apple' and your prep action could be 'Sliced'
We spent 5 years testing and retesting ingredients to find their yields. For example, we conducted ~1,000 different tests to figure out the yield of thai basil leaves in 1 cup. We got about 250 different weights in grams. The prep actions in meez are averages of these 1,000 different tests! If our yield doesn't match the yield you found, we make it easy in meez to customize prep actions.