This comes from the Pioneer Woman on the foodnetwork. It's her Aunts recipe for salad dressing. She says Aunt Trish always used salad oil but you can use canola oil. And you can also use the Parmesan cheese that comes in a can if you wish.
This wonderful recipe is from the American Heart Association. It's great as a side dish but I think it would also work as a vegetarian meal..........lots of beans, corn , mushrooms and cheese mixed with lettuce. I love these layered, make ahead salads!