Choosing an olive oil dressing for your salad is the yummy heart-healthy way to go, so here's some easy and tasty recipes/tips from the University of Nebraska- Lincoln:

Making an Olive Oil Salad Dressing

"Limited and not conclusive scientific evidence suggests that eating about 2 tablespoons (23 grams) of olive oil daily may reduce the risk of coronary heart disease due to the monounsaturated fat in olive oil. To achieve this possible benefit, olive oil is to replace a similar amount of saturated fat and not increase the total number of calories you eat in a day." Food & Drug Administration qualified health claim for olive oil. FDA article:
http://www.fda.gov/bbs/topics/news/2004/NEW01129.html

What healthier way to enjoy olive oil than as part of a salad dressing served over a salad filled with nutritious fruits and vegetables. Here's how to make a basic olive oil dressing using the guidelines for a classic French vinaigrette...

See entire article:
http://lancaster.unl.edu/food/ciq_olive_oil.shtml