Drain pineapple tidbits; reserve juice.

Prepare rice-pasta mixture, according to package directions, using reserved pineapple juice, and water to make 2 cups. Cool to room temperature.

Combine pineapple tidbits, chicken, carrots, sunflower seeds, pepitas, almonds, and peas, in large bowl.

Stir in cool rice. Pour balsamic dressing over salad; toss to coat. Garnish rice salad with leafy lettuce, if desired.