Step 1: Determine the type of screws or bolts in the door and disassemble it.
Step 2: Rip off the hard plastic cover. Usually a screwdriver and some dumb force is sufficient.
Step 3: Clean the door thoroughly.
Step 4: Search www.instructables.com for some recipies and make the salad!
Not into salads? Try using the door in a vacuum chamber for Vacuum Infused Fruit (for ice cream)
PS. Although the glass of the door is fairly thick, you can't use it in an oven. It's not Pyrex!