Butter-Bean Spread

Ingredients

• 1 16-ounce can butter beans
• 1 scallion
• 1 small clove garlic
• 1/2 cup nonfat plain yogurt
• 1/4 cup grated Parmesan cheese
• 1 tablespoon extra-virgin olive oil
• 1 tablespoon red-wine vinegar
• 1/2 teaspoon chopped fresh rosemary
• 1/4 teaspoon salt
• 1/4 teaspoon freshly ground pepper