Add 1/2 tsp of salt to a large pot of water and bring to boil on the stove. Cook pasta according to the directions on package (about 9 minutes to al dente) and strain when done.
While the pasta is cooking, dice the orange and yellow peppers and slice the grape tomatoes into circular rounds (see picture).
Defrost the sweet peas in the bag in the microwave according to the directions on package (about 4 minutes).
Slice the mozzarella cheese sticks into circular rounds (see picture).
Drain and rinse both cans of sliced olives.
Add the pasta, bell peppers, grape tomatoes, peas, mozzarella cheese, olives, mini pepperoni, and Olive Garden signature Italian dressing to a large bowl and mix together. Feel free to add more or less of the dressing to adjust according to your taste!