elegant green bean salad

Ingredients

• 1 cup coarsely chopped walnuts
• 3/4 cup olive oil
• 1/4 cup white wine vinegar
• 1 tablespoon chopped fresh dill
• 1/2 teaspoon minced garlic
• 1/4 teaspoon kosher salt
• 1/4 teaspoon freshly ground black pepper
• 1 1/2 pounds whole fresh green beans,washed and stemmed
• 1 small purple onion, thinly sliced
• 1/2 cup dried cranberries
• 1/2 cup crumbled feta cheese
• 1 package zip 'n steam bags (by ziploc)