Combine the rice, vegetable stock and 1/4 teaspoon salt in a medium saucepan. Bring to a boil; cover, reduce the heat to low and simmer until the liquid is absorbed and the rice is tender, 40 to 45 minutes. Stir in the dried fruit during the last 5 minutes of cooking.
Spread the rice in a single layer on a parchment paper-lined rimmed baking sheet to cool to room temperature, about 30 minutes.
Whisk together the vinegar, curry powder, honey, 1/4 teaspoon salt and 1/4 teaspoon pepper. Gradually whisk in the olive oil until combined.
Transfer the cooled rice to a serving bowl. Add the desired amount of the vinaigrette, then the green onion, arugula, and pistachios toss to combine. Adjust seasoning with salt and pepper, as needed.