Cook rice according to package directions; set aside to cool.

Meanwhile, cut apples into slices and then into thirds. Cut broccoli into small, bite-sized pieces; julienne carrots (or slice thinly), and chop onion into small pieces. Toss all together in a large bowl.

In a small bowl, whisk together the salt, pepper, sugar, lemon juice, yogurt, and sour cream. Add 1/2 the dressing to the bowl with the veggies, along with the cooled rice, raisins, and chopped walnuts. Toss to thoroughly coat and combine. Add more dressing if desired to taste. Store in an air-tight container in the refrigerator if not serving immediately.

Serve with sliced peaches on the side (use fresh if in season!).