Quiz / Reality check: Do you know how to use nouns in sentences?

To use a noun in a sentence, you need to know how to use basic forms, and add endings as needed.

Prove to yourself that you can do this!

Follow the rules to add or change noun endings.  
This is a grammar-table exercise.  
Translator tools don't always work for this.  

You have a recipe that needs peas.  You have this grammar information (ignore the plus+):

What do you do? Fill in the blanks. (no capital letters or spaces, please, just the word.