Italian Pasta Salad

16 oz. box wagon wheel pasta or rotini pasta, (cooked, drained, and rinsed with cold water)
8 oz. can tomato sauce
1 cup Italian salad dressing
1 tsp. dried basil
1 tsp. dried oregano
1 cup sliced fresh mushrooms
5 plum tomatoes, coarsely chopped (1 1/2 cups)
1 cucumber, coarsely chopped (1 1/2 cups)
1/4 cup chopped onion
2 1/4 oz. can sliced ripe black olives, drained
1 1/2 cups cooked chicken pieces or crumbled hamburger (optional)

Mix tomato sauce, dressing, basil, and oregano in large bowl. Add remaining ingredients; toss.
Cover and refrigerate about 2 hours or until chilled.

Italian Pasta Salad