Fill a medium sauce pot with water and add 1/2 Tbsp salt. Bring to a boil, then add pasta and cook until tender.
Drain the pasta in a colander and rinse briefly with cool water.
In a large bowl, roughly chop spinach, rinse and drain kidney beans, and slice grape tomatoes in half.
Add beans, tomatoes, pepperoni, and cubed mozzarella to the bowl with spinach.
Add the cooled pasta to the bowl and toss until combined.
Add dressing and toss again until everything is coated.
Serve with Parmesan and freshly cracked pepper on top.
