Picnic Pasta Salad

1 package (16 ounces) rotini pasta
1 can (8 ounces) tomato sauce
1 cup Italian dressing
1 tablespoon chopped fresh basil leaves or 1 teaspoon dried basil leaves
1 tablespoon chopped fresh oregano leaves or 1 teaspoon dried oregano leaves
1 cup sliced fresh mushrooms (3 ounces)
5 roma (plum) tomatoes, coarsely chopped (1 1/2 cups)
1 large cucumber, coarsely chopped (1 1/2 cups)
1 medium red onion, chopped
1 can (2 1/4 ounces) sliced ripe olives, drained

Cook and drain pasta as directed on package. Rinse with cold water; drain.
Mix tomato sauce, dressing, basil and oregano in large bowl. Add pasta and remaining ingredients; toss. Cover and refrigerate about 2 hours until chilled but no longer than 48 hours.