Remove most of the core from the head of cauliflower. Cut the head of cauliflower in half. Coarsely grate the head of cauliflower using a box grater. Grate the cauliflower over/into a large heat-proof mixing bowl.
After the cauliflower is grated, pop it in the microwave for eight minutes. Remove the bowl from the microwave when finished heating. Let cool for 5-10 minutes.
Preheat the oven to 450 degrees F.
Add the egg, 1 cup of shredded mozzarella, Italian seasoning, garlic, salt and pepper to the bowl with the cauliflower. Use a rubber spatula to mix all of the ingredients together.
Use a ½ cup measuring cup to scoop out three big scoops of the crust mixture. Place each scoop on to a pizza pan lightly coated in olive oil. Press the crust mixture down and form it into a 6 inch circle about ¼ of an inch thick.
Switch the oven to broil. If you have a high or low setting on your oven for broil, go with high. Broil the pizzas for 3-4 minutes, until the cheese melts. Let the pizzas cool for 5 minutes. Cut into fourths and then serve.
Bake the crusts for 20 minutes. After 20 minutes, remove from the oven and let cool. Use a spatula to loosen the mini crusts from the pizza pan. This is the point where, if you were making these ahead of time, you could stop and wrap the pizza crusts in tin foil and then store them in the fridge for up to a week until ready to eat.
If you are eating the pizzas right away, place a tablespoon of marinara or pizza sauce on each pizza and spread it around evenly. Then sprinkle a tablespoon of cheese over each mini pizza.
For the cookies:
The vanilla wafers act as the buns for the hamburger cookie. Place a squiggly circle around the bottom bun using the green icing. Place squiggly circles of both the yellow and red icing around the other vanilla wafer.
Place the Keebler Peanut Butter Filled cookie on top of the vanilla wafer with the green icing (the lettuce) on it. Place the other vanilla wafer on top. Press down so the colors start to sneak out the sides.
Dab your finger in some water and slightly moisten the top of the cookie. Then press the pinch of sesame seeds into the moistened area. In the end it will look like a mini hamburger with lettuce, ketchup, and mustard on a sesame seed bun!