Voila! Here's the final result of the breakfast illustration we made. I loved using the graphic shapes and creating the final result with lots of interesting details. I'm looking forward to seeing yours! 

Reference photos and sketches first:

 

 

The illustration before textures: 

And the final result with the grainy textures:


And lastly, the final result with a retro touch and halftone texture:

A few more details of both: