Israeli Lemon Herb Salad

• 1 cup pearl couscous
• .25 cup parsley, finely chopped
• .25 cup mint, finely chopped
• 400 g tin white beans
• 1 Lebanese cucumber, diced
• 250 g cherry tomatoes, halved
• 1 lemon, juice and rind
• 2 tbsp extra virgin olive oil
• .25 cup walnuts, roughly chopped