The Ultimate Pasta Salad

Name: The Ultimate Pasta Salad
Ingredients: 1 (16 ounce) package uncooked tri-colored spiral pasta; 1 head fresh broccoli, cut into bite size pieces; 1 head fresh cauliflower, chopped into bite size pieces; 1 red onion, chopped; 2 teaspoons minced garlic; 8 ounces pepperoni slices, cut into quarters; 1 (8 ounce) package mozzarella cheese, cut into cubes; 1 (6 ounce) can large pitted black olives, drained and sliced; 0.5 cup olive oil, or to taste; 0.5 cup red wine vinegar, or to taste; salt and pepper to taste; Italian seasoning to taste