Herbed Lima Bean Hummus

Name: Herbed Lima Bean Hummus
Ingredients: 2 (10-oz) packages frozen baby lima beans; 1 large onion, chopped; 5 garlic cloves, smashed with side of a large knife; 1 teaspoon salt; 2 cups water; 1/4 cup chopped fresh cilantro; 1/4 cup chopped fresh flat-leaf parsley; 1 teaspoon ground cumin; 1/4 teaspoon cayenne, or to taste; 3 to 4 tablespoons fresh lemon juice; 5 tablespoons extra-virgin olive oil; 2 tablespoons chopped fresh dill; 2 tablespoons chopped fresh mint; Accompaniment:sesame won ton crisps or toasted pita wedges