Start by cooking your pasta.
While the box of pasta is cooking, start browning your beef, then add in one jar of pizza sauce and stir well.
Once your pasta is cooked, mix the meat mixture (above) and pasta together, then pour into the slow cooker.
I layer the mixture into the slow cooker by putting some pizza sauce at the bottom of the crock pot, then add my noodle/beef mixture, then add some cheese on top, then top with pepperoni. Then I add more pasta/meat, more cheese, then more pepperoni. Layer the top of the casserole with cheese and pepperoni and put the lid on the crockpot.
Let it cook for about 1-2 hours on low heat until everything is melted and smelling delicious, then enjoy!