- Quarter potatoes and place in a large saucepan fitted with a steamer basket. Steam for 20 to 25 minutes or until potatoes are tender when pierced with a sharp knife; set aside to cool.
- Spray a small skillet with nonstick cooking spray. Add ham; cook over medium-high heat for 5 minutes until lightly brown, stirring frequently. Add to bowl with potatoes, bell peppers and green onions.
- Whisk together dressing ingredients and drizzle over salad. Lightly toss to coat potatoes with dressing, then cover and refrigerate until ready to serve (at least 1 hour). Just before serving, stir in walnuts and basil.
Note: Salad may be prepared a day in advance, but add the walnuts and basil just before serving for the best flavor and texture.