Add items manually into a listpicker

Hi, I want to make an app with drink recipes. I want to make it possible to add items manually to a listpicker (with the names, ingredients etc.).
For example:
The first screen will have a button called "Add recipe" and the listpicker called "Recipes".
If you click on "add" a new screen will open with textboxes for the name of the drink and some textboxes for the ingredients, in which you can write the name etc.
At the bottom will be a "Save"-button.
If you tap "save", the written name shall be saved in the listpicker and the ingredients shall be saved seperately.
If you pick the recipe from the listpicker a new screen shall open with the name of the drink and the needed ingredients for the picked drink.
This all shall be possible for different drinks. Is this possible?

Yes, this is all possible.

Learn about using lists:

General Tutorials


Use different screens wisely

If you decided to use different screens, then you should switch them correctly, else you will run out of memory after a while...      
The recommended method of switching screens in App Inventor
(Thanks Taifun)
Also see demo: multiscreen.aia