• Boil your pasta al dente according to box directions. Drain and set aside.
• To a large ziploc bag add 3 drops of red food coloring and 1 tablespoon of water.
• Repeat with another zip-lock bag and the blue food coloring.
• Divide your pasta into 3 portions.
• Place one portion in the bag with the red food coloring.
• Place another portion in the bag with the blue food coloring.
• Set the remaining portion aside.
• Gently toss the pasta around in the sealed ziploc bags until the pasta is all evenly colored. Set aside to really soak in for about 5 minutes.

Assemble

• In a large mixing bowl add the the pepperoni, mozzarella cheese, onion and bell pepper.
• Add the Italian dressing and stir to combine.
• Add the white pasta to the bowl and stir to combine.
• Rinse the blue pasta and red pasta to remove any excess color.
• Add the red and blue pasta to the bowl and toss gently to combine everything.
• Chill for an hour and serve!