Place rice & 3 cups water in a saucepan & bring to the boil. Reduce heat and cover, simmer for 25-30 mins or until rice is cooked. Stand, covered for 10 mins, uncover & cool, transfer to a bowl & chill until needed.
Add vegetables, beans, parsley, nuts & seeds to rice; lightly toss to combine.
Whisk together remaining ingredients and drizzle over salad, toss lightly & serve.